Police in Glasgow are hunting a man they think carried out four early morning armed raids in the city, in less than 90-minutes.
The first happened at about 06:30 at RS McColls on Crow Road. The man threatened staff with a knife.
Just 15 minutes later a man with a similar description robbed the Drive Supermarket in Clarence Drive.
He is then thought to have struck at the Co-op in Great Western Road and at the Supersave Store in Govan Road.
In all four incidents the suspect used a blade to threaten staff.
In the raid at the Supersave Store, which happened at about 07:50, a struggle took place which left a male member of staff with a minor hand injury.
The suspect did not take any money from the shop before he made off towards Harmony Row in Govan.
He was described as white, Scottish, aged between 16-25 years, wearing a black hooded jacket with a red zipper, a purple T-shirt, black trousers and black shoes.
He was also wearing a balaclava.
PC Stuart Nutt, from Strathclyde Police's robbery unit, said: "Our inquiries so far have revealed that these four incidents are linked.
"We are checking CCTV and carrying out extensive inquiries in order to identify the man responsible.
"I would ask that any members of the public who were around any of the four shops which were targeted to contact us as soon as possible as they may hold vital information which can help the inquiry."