A shoplifter pulled a knife on an off-duty security guard when he was caught trying to steal chocolate.

The guard had popped into Tesco Express, on Fred Atkinson Way, off Otley Road, Shipley – where he works – when he spotted the “well-known” shoplifter.

The suspect brandished a knife when challenged and then ran off.

A police helicopter was scrambled as officers searched the area, and the man was quickly found and arrested.

Israr Khan, shift manager at the shop, said: “He tried to steal some chocolates - he is a well-known shoplifter. One of my colleagues, the security guard, said he pulled a knife.

“No-one was hurt.”

A police spokesman said officers were called to the shop at about 2.50pm.