ROBBERS pinned a man to the ground and threatened him with a knife.
The terrifying incident happened on Huddersfield Road in Liversedge at about 11.20pm on Monday.
The 59-year-old victim was walking past the junction of Lineham Court when he was approached by two men walking in the opposite direction.
They spoke to him and then tried to shake his hand before following him and attacking him from behind.
One of them pulled him to the floor and held him there and other threatened him with a knife.
They took property from his pockets before being disturbed by a passing car.
The men then ran off along Huddersfield Road in the direction of the Yew Tree pub.
One is described as white, aged between 20 and 25, about 5ft 9ins tall, slim and with dark-coloured hair.
He was wearing a light coloured baseball cap.
The other is also white, about 40 years-old and 5ft 6ins tall.
He is stockily built and was bald or had a shaved head.
He was wearing knee-length shorts with a black pattern on them.
Police want to speak to the driver of the passing car and anyone else who witnessed the incident.
Anyone with any information should contact Det Con Sophie Lawrence at Dewsbury CID on 01924 431085.
Alternatively, ring Crimestoppers, in confidence, on 0800 555111.