A masked gang armed with a knife and a suspected handgun attacked a petrol station in Halifax last night.
At 9.30pm, three people burst into Cote Hill Service Station on Burnley Road and threatened a member of staff inside.
The worker handed over cash and cigarettes and the gang ran off towards King Cross.
The worker suffered minor hand injuries and was taken to hospital for treatment.
All the gang had their faces covered.
They were all described as in their 30s to 40s and of heavy build.
Anyone who saw the three in the area at the time or might have any information that could help police should call Detective Sergeant Terry O’Keeffe in Calderdale CID on 01422 337086.
Information can also be passed on via Crimestoppers on 0800 555111.