Key Points:

Police are investigating the death of a man after an altercation at a party in New Plymouth.

Police said they were called to a house in the city's Blagdon area just after midnight and found the 31-year-old man dead.

"The death appears to have followed an altercation at a party nearby, a short time before the police were called," they said in a statement.

Police are treating the death as suspicious and a scene examination and area enquiries are under way.

Police have appealed for information.