Police say a 10-month-old baby was among three children who were found dead in a house in Bristol.

The children, which also included a boy, aged seven and a girl, aged three, were discovered following a "terrible and deeply disturbing tragedy".

Officers were responding to a welfare call in Blaise Walk, Sea Mills, at 12.40am on Sunday.

A 42-year-old woman has been arrested on suspicion of murder.

The woman is being held in police custody at hospital in a non-life threatening condition.

Avon and Somerset Police said post-mortems will now take place to determine the children's cause of death.

Formal identifications of the victims are yet to be released, but their next of kin have been informed and are being supported by specialist family liaison officers.

Chief Inspector Hayward-Melen said police are treating it as an isolated incident and there is no ongoing threat to the wider community.

She said: "The death of such young children is a great shock to the whole community, and this incident has had a profound impact on all of us in the police.

"We've been humbled by the community response to this tragedy. At a time of great sadness and disbelief, we've seen spontaneous acts of care and support.

"Within hours of the incident occurring, a local church was opened up for people to gather and mourn. This is what being in a community is all about and we'd like to thank all those who continue to offer this important and selfless service."

She added that detectives are in the early stages of a "highly sensitive, complex and thorough investigation".