A 46-year-old man has been arrested by police in the North investigating the murder of Kevin McGuigan.
He was detained in Antrim today.
He's the 13th person to be arrested as part of the investigation.
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A 41-year-old man arrested yesterday remains in custody.
The fallout from last month's killing has threatened to topple power-sharing in the North, with the Ulster Unionist Party saying it could no longer partake in the arrangement as it could no longer trust Sinn Féin.
