Detectives involved in a three-year search for a former miner from County Durham have made three arrests.
Edward Donnelly was last seen in March 2002
Edward Donnelly, from Sacriston, was 53 when he went missing in 2002 and police are now treating the case as murder, although no body has been found.
On Thursday a 41-year-old Sacriston man was arrested on suspicion of murder.
Two women from Sacriston, one in her late 30s, and one aged 65, were also arrested on suspicion of perverting the course of justice.
A Durham Police spokesman said: "We are now treating the investigation into his disappearance as a murder inquiry, but so far we have not found his body.
"Over the last few years we have relentlessly carried extensive searches and inquiries in Sacriston and the surrounding areas in our determination to discover what has become of him, and we will continue to do so."
Anyone with any information which would help with the inquiries is asked to contact police.