A shopkeeper was threatened with a hand gun during a robbery in Preston.
Police said a lone offender went into Khan and Sons shop, Miller Road at about 8.40pm on Monday night.
He threatened the shopkeeper with what is believed to be a hand-gun and demanded cash.
He then struck the man on the head before fleeing the shop empty handed.
The victim, a 43-year-old man, was taken by ambulance to the Royal Preston Hospital for treatment for a fractured cheek bone but has now been discharged.
DS Jerry Sturgess of Preston CID said: “This must have been an extremely frightening incident for the shopkeeper and thankfully they only suffered minor injuries.
“An investigation to identify the man responsible is underway and I would urge anyone who has any information that could assist us with our enquiries to contact us.”
A 41-year-old man from Preston has been arrested on suspicion of robbery and possession of cannabis and has been bailed pending further enquiries.
Anyone with information should contact police on 101 quoting log number 1178 of Monday, January 19.