Three men have been arrested in the North after officers intercepted a van carrying at least three mortars in Derry.
100 homes have been evacuated.
Security Correspondent in Northern Ireland, Alan Murray, says police came under attack when they were evacuating the area:
Advertisement
new jPlayerPlaylist({ jPlayer: '#0', cssSelectorAncestor: '#jp_container_0' }, [ { title:'Alan Murray', mp3:'http://www.radiocms.net/content/hose/media/000142/179655_0725175.mp3'
} ], { swfPath: '/assets/includes/js/jPlayer', supplied: 'mp3', wmode: 'window' });