Another militant also spotted on security footage stalking terminal while 'spraying bullets'
Walking alongside a pilot, this is one of the alleged ISIS bombers just moments before blowing himself up in the Turkish airport massacre that killed 42 people.
The suspect was captured on CCTV appearing to hold something - possibly his gun or explosive vest - in place under a puffa jacket as he strolled into Ataturk Airport in Istanbul.
Other footage shows a man dressed all in black stalking the arrivals hall while appearing to fire a weapon, it was reported by Turkish news site .
It comes after survivors told how terrified passengers fled in all directions past corpses after three fanatics sprayed bullets through the terminal before blowing themselves up.
At least 42 tourists including 13 foreign nationals were killed and another 239 wounded after they were cut down in a hail of gunfire and explosions yesterday evening.
One witness said: "Everywhere was covered with blood and body parts. I saw bullet holes on the doors."
One man on his honeymoon told how his wife was injured as they came face to face with one of the gunman.
Steven Nabil, an American journalist, said the newlyweds survived by hiding inside a closet in a hair salon as the militants fired towards them.
Mr Nabil comforted his wife for 45 minutes as they cowered inside the cupboard, all the time fearing the fanatic might open the door at any point.
Writing on Twitter, he said: "My wife was injured during the attack. We were face to face with the attacker while he sprayed.
"I ran back, got my wife and pulled her to the store, broke in and waited in terror while he was shooting outside. We barely made it.
"We took cover in a closet inside a hair salon. For 45 minutes, we were sitting ducks waiting to find out who will open the door."
He said he begged his wife to keep calm in case they alerted the attackers.
He said: 'I looked desperately for anything sharp to protect her if they opened the door and took hostages.
'I used boiling tea water as weapon as if he found us.'
Mr Nabil, who was born in Iraq but moved to the United States as a teenager, said he was heading back to New York at the end of his honeymoon when the terrorists struck.
Writing on Twitter, he said: "My wife was sitting at [a coffee shop], while I went to the third floor to get some food.
"I heard shots and ran fast toward her. I came down the stairs to see the court empty and the terrorist firing toward us. I carried her arm and ran."
Three suicide bomb blasts ripped through Ataturk Airport in Istanbul at around 8pm in a Brussels-style massacre that has killed at least 46 people and left 239 others injured.
Thirteen foreign nationals are among the dead, including an Iranian and a Ukrainian, as well as 23 Turkish citizens.
The attackers stormed the building while raking passengers with bullets and then detonated their explosives at the entrance of the international terminal before entering the X-ray security machines.
Hundreds of terrified passengers fled the building in the wake of the blasts amid a pile of debris and bodies.
A British teacher told how he was knocked over by the force of the second explosion after watching other tourists being shot dead by a gunman.
Duncan Ross from Troon, Scotland, fled as other passengers scrambled towards exits and barricaded themselves in bathrooms.
Mr Ross, who was celebrating his 23rd birthday with friends at the time, told the Daily Mirror: "I was knocked over by the second blast.
"I saw the second guy shooting. I saw it all. Never in my life have I been so terrified but thankfully I'm okay."
David Cameron has said there are no reports of UK casualties, but said the Foreign Office was working urgently with the Turkish authorities to establish the full facts.
Addressing the Commons, the Prime Minister said: "You will join me in condemning the horrific terrorist attacks in Turkey last night.
"Our thoughts and prayers are with those who were killed and injured and their families.
"We stand in defiance as one against these barbaric acts."
Earlier, footage captured the moment one of the suicide bombers was gunned down by a cop but still managed to detonate his explosive vest.
In the dramatic CCTV clip, the hero cop can be seen bravely approaching the attacker before opening fire.
The bomber falls to the floor but detonates his vest as the officer runs for his life. It is unclear if he survived the blast.
Attackers set off suicide bombs and sprayed civilians with bullets from automatic weapons in what Turkish security forces say is an ISIS-coordinated atrocity.
The suicide bomb attack marks the second anniversary of the Islamic State Caliphate.
In a statement given at the airport, Turkish Prime Minister Binali Yildirim confirmed the death toll, and that some of the victims were foreigners.
Turkish officials said 41 people were confirmed dead but the number of fatalities was expected to rise to 50.
The attackers fired indiscriminately at travellers before detonating three bombs, according to eyewitness accounts.
Survivors described how gunmen “randomly” blasted passengers leaving pools of blood on the floor.
A woman named Duygu, who was at passport control after arriving from Germany, threw herself to the floor after the bomb went off.
She said: "Everyone started running away.
"Everywhere was covered with blood and body parts. I saw bullet holes on the doors."
Brit tourist Laurence Cameron told Good Morning Britain: "It was just a sea of people, screaming, running towards me.
"I initially thought it was a hoax or something.
"It became apparent quite quickly that something was wrong.
"All the passport desks had been abandoned, police were everywhere, guns drawn... it was chaos."
Eyewitness Paul Roos, 77, described seeing a terrorist “randomly shooting” at people 50 metres away.
He was due to fly home to South Africa when the gunmen attacked,
Paul told Reuters: “He was wearing all black. His face was not masked,” said Roos, a South African on his way home after a holiday in southern Turkey.
“We ducked behind a counter but I stood up and watched him. Two explosions went off shortly after one another.
"By that time he had stopped shooting. He turned around and started coming towards us."
“He was holding his gun inside his jacket.
“He looked around anxiously to see if anyone was going to stop him and then went down the escalator.
“We heard some more gunfire and then another explosion, and then it was over.”
Harrowing video shows the panic and devastation in the moments after the deadly suicide attack.
In one, passengers cower on the floor in terror in the seconds after the blast.
A woman is heard crying and a man shouts: “what is this?”
Another video shows the walls of the airport blown to shreds, a smoke filled departure lounge with pools of blood on the floor.
All flights were diverted from Ataturk for several hours, including a British Airways plane from London.
Flight BA680 landed back at London Gatwick just before midnight.
A BA spokesman said: "We had one flight to Ataturk airport that has turned around and is coming back to London Gatwick.
"We don't have any other services scheduled today and we will keep the situation under review."
Officials said the "vast majority" of the injured and dead are Turkish, but foreigners are among the victims.
Turkey's President Recep Tayyip Erdogan condemned the attack, saying: "It is clear that this attack is not aimed at achieving any result but only to create propaganda material against our country using simply the blood and pain of innocent people."
He said the attack, which took place during the Muslim holy month of Ramadan, "shows that terrorism strikes with no regard to faith and values.
"Turkey has the power, determination and capacity to continue the fight against terrorism until the end."
The British Foreign Office is "urgently seeking further information" out of fears Brits may have been caught up in the attack.
Meanwhile air traffic has returned to the airport although security has been boosted.
David Cameron interrupted crucial post-Brexit talks with EU leaders to comment on the horror.
He said on Twitter: "Appalled by attack in #Istanbul tonight. Thoughts and prayers with all those affected."
Three attackers are thought to have been involved in the atrocity, which ISIS have reportedly claimed responsibility for, according to Turkey's Dogan news agency.
Police are believed to have returned fire in an attempt to minimise the number of casualties.
CCTV captured the moment a hero cop wrestled one of the bombers to the ground before he detonated his bomb vest, potentially saving more lives.
The injured have been taken to Bakirkoy State Hospital for treatment.
A spokesman for Heathrow Airport, which has several daily flights to Istanbul, said: "The safety and security of our passengers and colleagues is our highest priority.
"We are closely monitoring the ongoing situation at Istanbul's Ataturk International Airport and are working with our airline partners to determine what effect this may have on flights.
"We ask passengers travelling to Istanbul to first check their flight status with their airline."
The current Foreign Office guidance for Brits travelling to Turkey suggests visitors "should avoid demonstrations or large gatherings and remain vigilant".
A spokesman for Heathrow Airport, which runs daily flights to Ataturk, has asked passengers to check with their airlines before travelling on Wednesday.
Defence Secretary Philip Hammond described himself as "shocked" and said "we stand ready to help".
A spokesman for the Association of British Travel Agents (Abta) said: "Following an incident at Istanbul Ataturk Airport, travellers to Istanbul are advised to follow the advice of the local authorities and the Foreign and Commonwealth Office.
"The Foreign Office currently advises that British tourists visiting Turkey should avoid demonstrations or large gatherings and remain vigilant."
Turkey has suffered several deadly attacks in recent months which have targeted areas popular with tourists and have been blamed on Kurdish separatists or IS.
This attack comes just months after Brussels was hit by suicide bombings at the airport and on the Metro.
World leaders have been quick to condemn the sick attacks.
Belgium PM Charles Michel expressed solidarity and tweeted: “Our thoughts are with the victims of the attacks at Istanbul's airport.
“We condemn these atrocious acts of violence.”
Meanwhile the White House described the attack as “heinous” and offered “steadfast support for Turkey”.
Presidential candidates Hilary Clinton and Donald Trump both condemned the terrorists.
Clinton said: “Today’s attack in Istanbul only strengthens our resolve to defeat the forces of terrorism and radical jihadism around the world.
“We must deepen our cooperation with our allies and partners in the Middle East and Europe to take on this threat.”
Trump, who has suggested banning Muslims from entering the US as a safeguard against terrorism said: “Our enemies are brutal and ruthless and will do anything to murder those who do not bend to their will. We must take steps now to protect America from terrorists, and do everything in our power to improve our security to keep America safe.”
German foreign minister Frank-Walter Steinmeier said he was grieving for the victims.
Meanwhile Canadian Prime Minister Justin Trudeau tweeted his condolences.
He said: “Canada strongly condemns tonight’s deadly attack in Turkey. My thoughts are with the victims as we stand with our allies against terrorism.”
French Prime Minister Manuel Valls added: “Appalled by the barbaric attack at the airport of Istanbul.
“France stands with Turkey against terrorism.”
- 28 June 2014: ISIS bring back the caliphate abolished in 1924
- 12 January 2016: A suicide bomb attack against tourists in Sultanahmet in Istanbul kills 10 people.
-17 February: A large bomb attack near a military barracks on Eskisehir Road in Ankara kills 28 people
- 13 March: Bombers kill more than 30 people at Kizilay Square in central Ankara
- 19 March: A suicide bomb attack against tourists on Istiklal St in Istanbul kills 4 people
- 27 April: A suicide bomb attack at Bursa Ulu Mosque kills the attacker and injures 7 people
- 1 May: A bomb attack at the Central Police Station in Gaziantep kills two police officers and injures 23 others
7 June: A bomb attack in the Vezneciler area of Istanbul kills 7 police officers and 4 civilians, injuring 36 more people
28 June 2016: Two year anniversary of the caliphate. Ataturk International Airport in Istanbul is attacked leaving 36 people dead and 147 injured
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