An investigation is under way after a 44-year-old man died at a police station.
Police said the man who died at Peterlee Police Station, Co Durham, had been arrested following a disturbance in Seaham on Saturday afternoon.
A Durham Police spokesman said: "An investigation is being carried out into the death of a man following his arrest by Durham Constabulary.
"The man, aged 44, was arrested after police were called to a disturbance in Ash Crescent, Seaham, at 4.45pm.
"The man was taken to Peterlee Police Station and on his arrival his condition gave cause for concern.
"Medical assistance was summoned but the man was pronounced dead at the scene."
The spokesman said a postmortem examination is due to take place later today.
An investigation has already begun by Durham Police's professional standards department and the Independent Police Complaints Commission has been informed and is attending the scene.
The dead man has not been named.