An elderly man has been arrested after the sudden death of a 42-year-old woman at a house, police have said.
Officers were called to a home in Farthingale Way, Hemlington, Middlesbrough, at about 7pm on Friday, after they received reports that a woman was unresponsive.
Cleveland Police said they were treating the death as "unexplained" and a post-mortem would be held.
A spokesman said: "A 73-year-old man has been arrested in connection with the death and remains in custody."
Specialist forensic officers were working at the house, which is in a cul-de-sac.