Police are hunting a teenage gang who tried to rob an 11-year-old boy.
The youths ran off when they were then disturbed by a man, believed to be in a black VW Golf.
The boy was unhurt.
Detective Inspector Alan Flynn, of Bradford CID, said: “We are particularly keen to trace this person, who we believe was in a black Volkswagen Golf car, as they could have vital information which will assist in our investigation.”
Five of the youths were described as white and one Asian.
They were believed to be aged around 13 to 14.
All were wearing hooded tops and black trousers.
Anyone with information is asked to contact Det Con Asif Khan at Bradford CID on 101 or Crimestoppers on 0800 555111.