Detectives investigating the murder of Bradford man Barry Selby are appealing for information on a distinctive vehicle which is believed to have been used to transport the suspects to and from the crime.
It is a black Mitsubishi Warrior which was manufactured between 2006 and 2009.
It had distinctive blue under body lighting around its base and light coloured foot plates and wheel arches.
Mr Selby, who was 50, died in hospital three days after masked men broke into his house and attacked him on 14 October this year.
Four men have been charged with murder.
Detective Chief Inspector Nick Wallen, who is leading the investigation, said: “We are very keen to trace this vehicle as it may hold vital information to our enquiries.
“I am appealing to the public, particularly people living in Bradford, to think back to around mid-October this year and ask themselves if they saw that vehicle in the Bradford area.
“I would also be interested to hear from anyone who knew of someone with such a vehicle or if they have seen that vehicle in the possession of someone they know.”
Anyone with information is asked to contact Bradford CID on 101.