A man was driving his van down Sandy Lane on Wednesday morning when he was forced to stop by two men standing in the road.
The pair were armed with what appeared to be metal pipes.
They demanded he got out of the van, but instead he refused and drove away.
The suspects then got into a black Audi and fled in the direction of Northrepps.
One of the suspects was described as white, over six foot tall, with silver short dyed hair and wearing a grey hooded top.
The second was described as white, over six foot tall, in his 30s, with blonde hair and wearing a black hoodie and tracksuit bottoms.
Anyone who may have witnessed the incident, or seen the two men in the area, should contact Detective Sergeant Sarah Knights at North Walsham Police Station on 101.
Alterntaively contact Crimestoppers anonymously on 0800 555111.