A murder investigation has been launched after a man was found stabbed in a street in Birmingham city centre.
The man was found in Thorp Street, near the Hippodrome theatre, late on Saturday evening, police said.
The man, who has not yet been identified but is believed to be aged 46, was taken to hospital but died a short time later.
A post-mortem examination is yet to take place. Thorp Street was cordoned off for forensic examination.
Det Ch Insp Wayne Jones, who is leading the investigation, appealed for a taxi passenger to contact police again.
"We are unclear of the motive at this stage and are keeping an open mind as to how the man has come by his injuries," he said.
"We have already spoken to a number of witnesses one of whom was a taxi driver, we are also keen to trace and speak to two further potential witnesses.
"The first is a woman who we believe was a passenger in the taxi and the second is an individual, who we believe to be a man, who was in the street at the time of the attack."