Four people are facing charges in relation to the death of a Bay of Plenty man,

Jamaine Wharton attended a 21st birthday party at the Waiohau Rugby Clubrooms on February 27, where he was assaulted and later stabbed.

The 31-year-old was taken to the Whakatane Hospital in the early hours of Sunday morning where he tragically died, says Whakatane Area Investigations Manager, Detective Senior Sergeant Paul Wilson.

Police have arrested two men aged 25 and 20 and a 16-year-old youth for assaulting Jamaine at the party.

They have been charged with assault with intent to injure and will all appear in the Whakatane Youth Court today, says Paul.

Police have also arrested a 42-year-old woman for inciting the assault.

She is also due to appear in Youth Court today.

'While we are yet to charge anyone with Jamaine's murder, the investigation team, including detectives from the wider Bay of Plenty district is focused on piecing together the exact movements and actions of those involved in his death,” says Paul.

'They know exactly who they are and we're committed to holding them to account for Jamaine and his family and friends.

'We would like to thank those people who have come forward with crucial information.

Anyone who has not yet made contact with us is asked to call Police on 105, quoting file number 210228/0465.”

Information can also be passed on anonymously through Crimestoppers on 0800 555 111.