Police have arrested a fourth man on suspicion of the murder of Cody Fisher, who was stabbed to death in a Digbeth nightclub on Boxing Day.
The 18-year-old was held in Erdington just before 7am on Thursday (12 January) and will be questioned over the death of Cody.
Cody, 23, was stabbed on the dance floor of the Crane nightclub on Adderley Street in Digbeth just before midnight on Boxing Day.
He died at the scene.
Two men have already been charged with his murder, while a third has been released on police bail while inquiry continues.
Kami Carpenter, 21, and Remy Gordon, 22, appeared at Birmingham Crown Court charged with murder and affray.
They will appear for a plea and trial preparation hearing at the same court on March 17 and a provisional trial date was set for July 3.