A number of men have been warned by police that their lives could be in danger from a fugitive wanted for questioning about a murder in Londonderry.
PSNI Chief Inspector John Burrows urged Kieran McLaughlin, 58, an ex-republican prisoner, to hand himself over.
Up to 100 officers are involved in the investigation and search for Mr McLaughlin who has not been seen since the shooting dead last week of Barry McCrory, 35. He was gunned down in a flat he shared with his partner.
Even though Gardai across the nearby Irish border in Co Donegal are also trying to find him, police in Londonderry believe he is hiding out somewhere in the city. There has been several unconfirmed sightings and senior officers are concerned about the potential for further bloodshed.
A stabbing incident just days before Mr McCrory was shot in Shipquay Street last Thursday is also being investigated as part of a wider inquiry.
Mr Burrows said today Mr McLaughlin should only be approached with caution. He added: “We have discussed with a number of people their security in relation to this case. We can manage this risk at the moment.”
His family has pleaded with him to give himself up.
Pat Ramsey, an SDLP member of the Northern Ireland Assembly, said they were clearly distressed about his current whereabouts.
He added: “I want to urge Kieran to contact the PSNI so that he can give an account of his movements. We all want to see a swift and safe end to the tragic events of last week.
“The PSNI have made it clear that they will make every possible effort to ensure ease of passage into Strand Road police station. I would urge Mr McLaughlin to contact the PSNI as soon as possible.”