A woman arrested by detectives investigating the murder of businessman Akhtar Javeed has been released on police bail pending further inquiries.
The 19-year-old was detained by West Midlands Police late on Friday at an address in Leicester on suspicion of assisting an offender.
Officers are continuing to question two men aged 18 and 26, who were arrested in Derby and Leicester, on suspicion of murdering Mr Javeed.
The father-of-four, aged 56, was shot in the neck during an attempted robbery at a drinks distribution warehouse in Digbeth, Birmingham, on February 3.
Detective chief inspector Martin Slevin, who is leading on the investigation, said: "I continue to appeal to people to come forward, I firmly believe that someone out there may still have information that could help our investigation and I am urging them to call me or one of my team."
Mr Javeed's family, who live in east London, continue to be supported by specialist officers.
Detectives have seized a silver Renault Megane as part of the inquiry, having appealed for sightings of a car seen leaving Rea Street South with its lights off shortly after the shooting.