A robber armed with a knife has targeted three people in Keighley.

Airedale and North Bradford CID would like to speak to anyone who witnessed the incidents, which took place last Friday and on Monday. All the incidents took place at the bottom of Spring Gardens Lane.

At about 4.40pm on Friday a man threatened a 53-year-old woman with a knife and demanded £20. He fled after the victim handed over some cash.

In the second incident, which took place at 4.15pm on Monday, a 50-year-old man was threatened with a knife by the suspect who again demanded change. The robber fled empty-handed after the man told him he did not have any money on him.

About 15 minutes later a 63-year-old man was confronted by the suspect, who ran off after he was offered a small amount of change. The robber is described as slim, 5ft 6in tall and 16 to 20 years old. On all three occasions his face was covered by a scarf with his coat pulled up.

Det Insp John Mountain, of Airedale and North Bradford CID, said the incidents were linked. Anyone with information should contact CID on 0845 6060606.