Police were called to an address on Eddleston Walk in Hartlepool shortly after 1am today, Tuesday 15th April, where a 50 year old woman was found with serious injuries.
Sadly she was pronounced dead at the scene.
The death is being treated as suspicious and a post mortem examination will take place.
A 49 year old man has been arrested on suspicion of murder and will be questioned by police.
Enquiries are ongoing.