AN attacker allegedly lay in wait for a heavily-pregnant mum on the school run in Aberfan before knifing her five times, it has been claimed.
Cops swarmed the south Wales town after the horror attack at 9.10am yesterday morning.
Seven hours later at least ten armed officers swooped on a house near Aberfan and took a 28-year-old man into custody.
The mum-of-two, 29, is under police guard in hospital as doctors monitor the health of her unborn baby due at Christmas.
Now police are investigating claims the attacker was "lying in wait" for the mum as she returned from dropping off her children at primary school, reports.
Local mum Petra Thomas told the newspaper: "He just came out of nowhere and stabbed her before running off to a car."
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Veterinary nurse Katie Roberts, 31, was the first on the scene - and may have saved the woman's life.
Hero Katie said: "I was at home when I heard screaming and thought it was kids messing about.
"I looked out of the window and saw a man with a large knife in his hand standing over a woman on the road outside.
"He was stabbing her in the back and when I and other neighbours ran outside he ran off."
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The victim's ex-partner and dad to her two children also paid tribute to her.
He told : "Thank God she is okay. I was so worried about her.
"She is a very good mother, she is looking after the children very well."
Video footage showed a man being led away by officers yesterday afternoon around 1.5miles from the crime scene.
In a press conference yesterday evening, Chief Inspector Miles said: "I appreciate there will be a real sense of shock to the community where the attack happened in broad daylight."
He has described the stabbing as a "targeted attack".
The arrested man is known to the victim, who remains in hospital with injuries that are not thought to be life-threatening.
Four local schools and a childcare centre locked down while cops scrambled to find the suspect.
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Welsh First Minister Mark Drakeford told the Senedd: "For the moment our thoughts remain with the people caught up in them.
"There will be more, no doubt, that we will learn."