A man's dog has helped scare off a robber as he was walking his pet in Weston.

Police say the 43 year old was heading along Milton Road last Wednesday evening when he realised someone was following him - but it was on Ashcombe Park Road when another man on a mountain bike stopped in front of him and demanded money, then grabbed the victim's arm.

He managed to shake off the offender, then released his dog from its lead, and when it began growling at the suspect - he rode off.