Armed robbers struck at shops in Lancaster and Garstang last Saturday night (February 4).
At about 8.40pm, one of the masked pair hit a 20-year-old shop assistant at Leas Grocery store on Coulston Road in Bowerham after he refused to open the till.
The raiders left empty handed and were seen to run off down Cork Road.
Both men are described as being around 5ft10” tall, slim build, wearing grey clothing and hoods with scarfs or similar disguising the lower part of their faces.
Almost an hour later at 9.30pm, two men have entered the off-licence on Croston Road at Garstang with an iron bar.
One reached over the counter near the female shop assistant and stole part of the till containing a small amount of cash. Both ran off towards Garstang town centre.
The following day the stolen till was recovered at Fowler Hill layby, with the cash missing.
The first offender is described as white, quite pale, with possibly light coloured or ginger eye brows, about 5ft8” tall, average build with a local accent. He was wearing dark clothes with his hood up and trainers.
The second man is described as being around the same height and build with the same local accent but was but not as pale and had dark eyebrows.
Detective Sergeant Colin Forsyth from Lancaster CID said: “Both incidents are serious and have left the shop assistants badly shaken but thankfully no one was injured.
“We are still at the early stages of the investigation but we believe both offences could be linked and would appeal for any witnesses in Lancaster or Garstang who saw any suspicious people or vehicles around the times of the incidents to contact police.
Anyone with any information should call Lancashire Police on 101.