Two men have been arrested and another charged, after two raids on security van drivers in Birmingham on Thursday.
The first incident took place at Lloyds TSB on Coventry Road, in Sheldon, at shortley before noon, when a Group 4 security driver made his cash delivery.
The security guard was pushed to the ground by a man who attempted to escape with a cash box.
His escape was foiled when a group of bank customers overpowered him and helped the security driver detain him until police arrived.
A 21-year-old man from Sparkhill has been charged.
In the same day, a similar attack occurred outside Farmfoods, on Coventry Road, in Yardley, at approximately 1.20pm, when two security van drivers were collecting cash from the store.
As one of the drivers left the store with a cash box, he was approached by man who appeared to be armed. The driver was instructed to drop the box and the offender then made off with it in a small vehicle, driven by an accomplice.
Two 22-year-old men were later arrested at a store on Amington Road after the vehicle they were driving, was involved in a collision.
Police are seeking another man in connection with the Farmfoods incident.
Anyone who has information is asked to contact West Midlands Police on 0345 113 5000, or Crimestoppers anonymously, on 0800 555 111.