A 28-year-old man has been arrested on suspicion of the murder of a woman in Donaghadee, County Down.
Sarah Montgomery, a 27-year-old mother of two, was pregnant at the time of her death.
Police received a report at approximately 14:15 BST on Saturday of an unconscious woman with a serious injury inside a house in the Elmfield Walk area of the town. Ms Montgomery was pronounced dead at the scene.
Police cordons remain in place.
Det Ch Insp Tom Phillips said: "Enquiries are at an early stage into this deeply tragic case.
"Our thoughts are also with Sarah's family during this incredibly difficult time – as they struggle to come to terms with what has happened."
He added that the family are being supported by "specially trained officers".
North Area Ch Insp Yvonne McManus added: "We understand this news will cause shock and concern within the community.
"We recognise the profound impact that violence against women and girls has on individuals, families and wider society.
"Addressing this issue remains a key priority, and we are committed to engaging directly with the local community to offer support, build trust, and help people feel safe."
Alliance councillor for the area John Hennessy said the "local community is in complete shock" at this "devastating incident".
"My thoughts go out to Sarah's family and loved ones, especially her children."