Four men arrested in Derry as part of dissident probe

Police investigating dissident republican activity have made four new arrests in Derry.
They men, aged 36, 38, 42 and 44, were arrested just before midnight last night and brought to Antrim police station for questioning.
A week ago, five men were arrested on the Louth Armagh border on suspicion of trying to move explosives across the border.
It happened when three cars were stopped by Gardai as part of a planned operation against dissident republicans.