A shop owner was hurt in a struggle with a would-be robber who demanded cash from the till.
The teenager went into the shop in Union Road, Wyke, at around 10.10pm on Thursday as the 64-year-old owner was getting ready to close up for the night.
A struggle began after the teenager told the owner to open the till.
He was disturbed by a customer and ran off towards Acaster Drive.
The owner needed hospital treatment for a small cut to his arm.
Police are now hunting for a boy in his late teens, of average build and around 5ft 10ins tall.
He was wore a dark coloured top and his face was covered.
Tong and Wyke Neighbourhood Policing Team is also carrying out reassurance patrols.
Phone Det Con Louise Matthews at Bradford South CID via 101 or Crimestoppers on 0800 555 111 with any information.