A manhunt has been launched by police after a woman died following a domestic incident in Middlesborough.
Members of the public are warned not to approach Graham Barry Gibson.
He is being sought after the discovery of a body at an address in Cherwell Terrace, Bramble's Farm, at 1am on Monday.
A statement issued by Cleveland Police said: "Police urgently need to speak to Graham Barry Gibson in connection with her death and would urge Mr Gibson to hand himself in to a police station."
A spokeswoman for the force said: "The man police are trying to trace in connection with the incident is believed to be white, in his 40s, around 6ft 2in tall and of proportionate build.
"He has short, dark brown hair and was last seen wearing a chequered shirt, dark jeans and black trainers.
"Police believe this has been a targeted, domestic-related incident. However, they are appealing for anyone who has seen this man or knows of his whereabouts, not to approach him directly but to get in touch with Cleveland Police via 999."
The scene was being heavily guarded by police, with a white forensics tent set up in the front yard of the brick-built terrace house.
Most residents of the estate declined to comment on the death.
One woman in a nearby property, who did not want to be named, said: "All I saw were lots of blue lights and this morning they said someone had been murdered - a lass, I think.
"It's a good estate - you don't expect this."
Another resident, who lives a few doors down, said: "I was woken at about 4am and the police came round to talk to us.
"It's just rumours flying round at the moment.
"This is a quiet road of the estate. It's mainly older people who live here. Everyone just keeps themselves to themselves."