Police are investigating after a man was dragged from his mobility scooter and robbed at knifepoint.
The attack happened on Beaconview Road in West Bromwich, at around 5.30pm on Monday 5 November. The robber fled before police arrived.
A man passing in his car saw the assault and stopped to help the victim. He was taken to hospital with facial injuries.
Officer are urging other witnesses, or anyone who might have information, to come forward.