Four people, including a 16-year-old boy, have been arrested on suspicion of murder following the death of a man.
The 57-year-old local man was found unconscious in the street in St Marys Road, Biscovey, Par, Cornwall in the early hours of Saturday.
Devon and Cornwall Police said he was taken to Royal Cornwall Hospital in Truro where he later died.
Three men, aged 21, 19 and 18, and a 16-year-old boy have been arrested on suspicion of murder.
The incident happened just after 2am and police have appealed for witnesses to get in touch.
The area around St Marys Road and Robbins Close has been cordoned off while scene-of-crime investigators carry out a forensic examination.
A force spokesman said: "Following police inquiries, at 4.05am three local men aged 21, 19 and 18 and a local youth aged 16 were arrested at a property in the area on suspicion of murder. They remain in custody at Launceston and Newquay custody centres.
"Police are appealing for witnesses who were in the vicinity of St Marys Road and Robbins Close between midnight and 2am or anyone who has any information regarding this incident to contact them."