The first man is described as Asian, aged 20 or 21, 5ft 7in tall, of slim build. His hair was shaved at the side but was longer on the top. He had a long face and was wearing black trousers, black boots and a black coat with a green fluorescent long jacket.
The second man is also thought to be Asian and is slightly shorter. He was 20 or 21 and wore a balaclava mask, black gloves, black clothing and black boots.
Witnesses should call Airedale and North Bradford CID on 101.