A 26-year-old man has been arrested in connection with the murder of former dissident republican leader Tommy Crossan.
The 43-year-old was shot dead at a fuel depot in an industrial complex near the Peter Pan centre in West Belfast on Friday - the sixteenth anniversary of the Good Friday Agreement.
The Police Service of Northern Ireland (PSNI) tweeted: "Serious Crime Branch detectives investigating the murder of a 43-year-old man in West Belfast yesterday have arrested a 26-year-old man."
Northern Ireland's First Minister Peter Robinson condemned the shooting.
Politicians have condemned the killing He said: "The small minority of people who want to continue terrorising the community need to understand that they will not be allowed to drag Northern Ireland back to the dark days of the past.
"They must be hunted down and brought to justice."
Deputy First Minister Martin McGuinness added: "The people behind this killing are criminals and will further no cause through this shooting.
"Whoever carried out this act has nothing to offer the community and have no role to play in our future."
Mr Crossan was the Continuity IRA's former leader and was believed to have been the subject of a death threat from his former allies.
He had been expelled from the group some years ago and was jailed for conspiracy to murder Royal Ulster Constabulary officers following a shooting at a police station in West Belfast in 1998.
The organisation has opposed the peace process which largely ended three decades of violence and transformed the region.
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