Initial reports suggested the dog, which was sedated and seized following the incident, may be an XL bully – but assessments will be carried out to confirm its breed, police said.
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.
Two people arrested over the death of a 19-year-old woman who was attacked by a dog in Bristol have been released on bail, police have confirmed.
In a press conference on Thursday, neighbourhood inspector Terry Murphy, of Avon and Somerset Police, said the dog involved in the attack had been put down.
Mr Murphy declined to comment on whether the woman who died lived at the address where the incident happened, or if there had been previous police contact with the household.