A four-year-old girl, named locally as Alice Stones, died in the attack in Milton Keynes on Tuesday.
Image source, FacebookA fatal dog attack on a four-year-old girl in Milton Keynes was a “tragic isolated incident” involving a family pet, police have confirmed.
Officers attended a house on Broadlands in Netherfield at 17:00 GMT on Tuesday after reports a dog had attacked a child in a back garden.
The victim has been named locally as Alice Stones, but she has not been formally identified by police.
Thames Valley Police said no arrests had been made.
Officers are also working to establish the breed of the dog, which has been “humanely destroyed”.
Speaking on Wednesday, Supt Marc Tarbit said: “An investigation is currently under way to fully understand the circumstances, but we believe this was a tragic isolated incident and there is no threat to the wider community.
“Accordingly, no arrests have been made at this time.
“I can confirm that the dog was a family pet and it was put down by police at the scene yesterday evening.”
Find BBC News: East of England on Facebook, Instagram and Twitter. If you have a story suggestion email eastofenglandnews@bbc.co.uk