Police are appealing for witnesses following an attack on a man in a Sowerby Bridge Park.
He was walking his dog between Recreation Road and Edward Street, Sowerby Bridge, at about 8pm on Wednesday, October 30.
His attacker is described as white, 5ft 10in tall, of a slim build. He wore dark clothing and spoke with a local accent.
He approached from the direction of Wallis Street and pushed the victim to the ground and demanded his wallet before fleeing empty-handed towards Back Pleasant Street.
The victim was unharmed but police are concerned about the unprovoked attack and urge anyone with information to contact Calderdale CID on 101 or Crimestoppers on 0800 555111.