Police are investigating the death of a man who was found seriously injured at a house in Leeds during the early hours.
Paramedics called officers to the address in Harold Grove, Hyde Park, shortly before 3.30am today.
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They reported that a 32-year-old man had been found seriously injured there.
A West Yorkshire Police spokesman said: "Paramedics gave emergency treatment but the man was pronounced dead at the scene a short time later.
"The death is currently being treated as unexplained and a post mortem examination is due to take place later today to establish the cause of death."
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A 39-year-old man has been arrested in connection with the incident and is currently in custody.