Police investigating the murder of a pensioner who died after being attacked during an argument with youths have urged those involved to come forward.
Mr Sheard was well-known around the local pubs, police said
Alan Sheard, of St Hilda's Terrace in Bradford, was walking along Leeds Road, Thornbury, on Sunday night when he got into an argument with the group.
It is believed one of the youngsters then assaulted the 67-year-old.
The group are described as Asian, with three in their late teens and one about 14 years old, police said.
They ran off up Thornbury Avenue after the incident.
Det Supt Dave Oldroyd said police were pursuing "positive" lines of inquiry.
He said: "I want to make it very clear that we are not talking about a sustained attack involving the whole group.
"Given these likely circumstances, I would like to take this opportunity to appeal directly to those who were present in that group to come forward and speak to us about what happened.
"Extensive inquiries are being carried out by a team of detectives and we are confident that we will be able to identify those involved.
"We would urge them to come forward and talk to us now before they get a knock at the door."
Police have also appealed for anyone who saw the attack to come forward.