Police widow 'worried for Northern Ireland'
Politicians and party leaders from across Northern Ireland and the Republic have condemned those who carried out Saturday's bomb attack in Omagh.
Constable Ronan Kerr, 25, was killed after a booby-trap device exploded under his car in Omagh, County Tyrone.
In March 2009, Constable Stephen Carroll, 48, was shot dead as he answered a distress call in Craigavon, County Armagh.
His widow, Kate Carroll, told BBC Radio 5 live's Stephen Nolan that Saturday's Omagh attack was a "cowardly act" and that she was worried for Northern Ireland.