A supermarket worker has been assaulted in an armed raid.

Masked thieves held up a Tesco Express in Airdrie, North Lanarkshire, last night.

One man with a knife and another with a firearm threatened staff and stole a three-figure sum from the High Street store.

Police said a male worker in his 20s was assaulted and received treatment for a facial injury at Monklands General Hospital in the town.

Two others, also in their 20s, were left "extremely distressed" by the raid.

The suspects, who wore dark clothing and ski masks, made off in a grey or silver-coloured car.

Detective Sergeant Kenny Dalrymple said: "This was a very traumatic experience for the three men who were working with the shop.

"I'd like to speak to anyone who may have seen the suspects hanging around outside the shop or the vehicle parked in the car park prior to the robbery taking place or anyone who may have visited the shop around 11.30pm on Sunday.

"I believe that there were some people who attended at the shop but found it closed.

"These people could hold vital information and I urge them to contact police immediately."

Anyone with information is asked to contact police on 101 or Crimestoppers on 0800 555 111.