ARMED cops last night gunned down a killer dog after it mauled a four-year-old to death.
Police evacuated locals in Milton Keynes, Bucks, so they could corner the beast after it attacked the young girl.
Cops scrambled to the scene shortly after 5pm after reports she was bitten in the back garden of her home.
Tragically the youngster was pronounced dead at a property on Broadlands, in the Netherfield area of the town.
When police arrived they evacuated neighbours due to fears the hound could escape.
Video taken at the scene shows a police officer asking locals to move away from the home.
He warns residents: "If this dog gets out, somebody is going to get hurt."
Residents were warned they may hear a gunshot.
It is believed the dog was cornered by armed cops and was gunned down.
Floral tributes were last night left at the scene following the horror.
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Superintendent Matt Bullivant of Thames Valley Police said: "This is an absolutely tragic incident, in which we believe that a child has been killed after being attacked by a dog.
"Clearly, we are in the very early stages of an investigation, and it would be wrong and unhelpful to speculate as to the exact circumstances of this incident at this point.
"However, in order to ensure public safety, a decision was made earlier this evening to destroy the dog involved, and this has been done humanely."