Three more men have been arrested after a man was shot dead and robbed of £10,000 cash and a laptop, police said.
Khurram Ashraf, 30, was blasted once in the stomach after he and a colleague were ambushed by a lone gunman as they left a money transfer shop in Longsight, Manchester, on Thursday.
The men, aged 25, 26, 29, were arrested on suspicion of murder and are being questioned by detectives.
Mr Ashraf, a post-graduate student from Rawali in Pakistan, had worked for several months at Global Forex.
He was leaving the shop on Stamford Road with two friends at around 6.20pm when they were confronted by a gunman who demanded the laptop and cash.
A friend of the victim said he was about to get into a silver Mercedes SL when the gunman appeared and demanded the bag carried by another employee, Mr Waqas.
He said Mr Waqas threw the bag to Mr Ashraf, who resisted the gunman's demands, and was then shot at several times.
Detective Superintendent Julian Ross, who is leading the investigation, said: "This is clearly a tragic incident that has resulted in a man losing his life.
"This appears to be an isolated, albeit utterly devastating, incident.
"We have received significant assistance from the public - however, our investigation is still at an early stage and we need that help to continue so I would urge anyone who has information that will help us solve this crime to come forward."
