A couple in their fifties have been stabbed to death at their Surrey home.
Police declared them dead on arrival at the house in Fetcham, near Leatherhead, in the early hours of this morning after they were alerted.
Detectives are now seeking information to locate 38-year-old, Viktoras Bruzas, from Walton-on-Thames, but originally from Lithuania, who is believed to be driving a black Mercedes registration AU11WJY.
It is believed that he is in Sussex and has connections in Surrey and south east London.
Another man in his 30s has been arrested in Walton-on-Thames on suspicion of conspiracy to commit murder.
Senior Investigating Officer Detective Chief Inspector Mark Preston, said: "This is a tragic incident where two people have lost their lives and our thoughts are with their family at this extremely difficult time.
"We are still in the very early stages of the investigation but we need to trace Viktoras Bruzas as a matter of urgency. I would urge members of the public not to approach him but to call Surrey Police immediately if they know his whereabouts.
"A large number of officers from Surrey and Sussex are working on locating Mr Bruzas.
"Sometimes, for whatever reason, people may wish to provide information anonymously and this can be done so through the independent charity Crimestoppers on 0800 555 111."