A spokesperson said officers attended alongside the ambulance service but the young woman, who was attacked by a dog believed to have been an XL bully, died at the scene.
A man and a woman, both aged in their 20s, were arrested on suspicion of being in charge of a dog dangerously out of control causing injury resulting in death and possession of a prohibited breed of dog.
Neighbourhood Inspector Terry Murphy said on Thursday: “Our thoughts, first and foremost, are with the family of the young woman who’s tragically died as a result of yesterday evening’s incident.
Two people have been arrested over the death of a 19-year-old woman who was attacked by a dog in Bristol, police have said.
Officers from Avon and Somerset Police were called to an incident inside a flat in Cobhorn Drive in the Hartcliffe area of the city at 7.19pm on Wednesday.