Three people were taken to hospital after gunmen, baseball bat, and machetes robbed into a Moss Side bar and forced customers to hand over their car keys.
Detective says three men break into the Princess Road café at about 10.30 on Saturday.
They threatened customers and asked to deliver their car keys and "personal items" before fleeing to a white Range Rover belonging to one of the victims and a white BMW 3 Series.
Three clients – all aged 20 – were taken to hospital.
Their wounds are not considered serious.
Shortly after the robbery the Range Rover stolen on Bowland Drive in Fallowfield.
Four men aged 1
They remain in custody for interrogation.
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Surveys are underway.
Supt Mark Dexter, said: "Fortunately, no one was seriously injured, but the victims were understandably shaken as a result of this incident.
" It is thanks to the quick action of our officers that we now have six men in custody, but this investigation is still very much in progress and the officers will be in a
"If you saw something suspicious, or if you know something that could help us with this investigation, please get in touch with the police the first possible.
"We are particularly excited to hear from anyone who has seen what has happened, or anyone who has filmed with dashcam from the BMW or the Range Rover around the time of the accident. "
Anyone with information is invited to call the police on 0161 856 4409 or 101, citing incident number 684 of 12/01/19, or Crimestoppers, anonymously, 0800 555 111.