04/11/2006 AT 02:30 PM EDT
Rapper Proof was shot to death early Tuesday morning in Detroit, the Associated Press reports.
The performer, 30, whose real name is Deshaun Holton, was a close friend of fellow Detroit native Eminem and a member of the rap group D12. He also had a small role in Eminem's semiautobiographical movie Eight Mile.
The shooting took place outside a nightclub on Eight Mile Road and left another man in critical condition, MTV.com reports. The name of the other victim – a 35-year-old man – was not released.
According to Detroit police spokesman James Tate, both victims were shot in the head after an argument escalated into gunfire at the CCC Club.
A posting on D12's Web site, D12 Online
, says, "Memorial service arrangements are still being made, and (Proof's) family and friends would appreciate privacy during this difficult time. Arrangements for fan remembrances are being planned, the details will be posted on Proof’s official site, IronFistRecords.com