Detectives investigating the murder of a man found fatally injured in a house in Berkshire are trying to trace a man who lived at the same address.
Opinderpal Singh Randhawa, 23, was found with a stab wound to his stomach at his home in Elliman Avenue, Slough, on 28 December.
He was taken to hospital where he died an hour later.
Kanwarjeet Singh Batth, 24, has not been seen since the evening of the murder.
Det Supt Rob Mason, of Thames Valley Police, said the victim and Mr Batth resided at the same address and he urged Mr Batth, or anyone who knew where he was, to contact police.
He said: "We believe that Mr Batth was in the Luton area not long after the incident occurred in Slough.
"However, his exact whereabouts at present are not known.
"I am therefore appealing to anyone with information, in particular to members of the Sikh community, who may not be aware that we need to speak to Mr Batth in connection with the murder."
Two men aged 30 and another aged 26 have been arrested on suspicion of murder and bailed until 7 January.
A fourth man, 23, was arrested and later released without charge.