A 34-year-old man has been arrested in connection with the bomb attack at Palace Barracks in Co Down last month.
The man was arrested this morning in the Dunmurry area near Lisburn.
He was taken to Antrim police station for questioning.
The car bomb exploded near the entrance to the British army base, which contains the MI5 headquarters for the North, on 12 April. No one was injured in the blast.
A dissident republican group claimed responsibility for the attack.
