The North's Assistant Chief Constable for Belfast, Mr Alan McQuillan, has described an arms find in north Belfast on Saturday night, which police link to the INLA, as "extremely worrying and dangerous".
The find in the nationalist Carlisle Road area included four pipe bombs containing ball bearings and nails, an anti-personnel mine, two detonators, a sub-machine gun, a shotgun and a large quantity of ammunition. A man was arrested in connection with the find.
Mr McQuillan said he was convinced the INLA was responsible for the arms cache as it was for much of the nationalist rioting in north Belfast last week. The group was officially on ceasefire, he said.
A device exploded in north Belfast yesterday afternoon. There were no reports of any injuries.
Meanwhile, police have been investigating two separate gun attacks on the homes of prison officers in Co Armagh on Saturday. No one was injured.
A man was shot in both ankles in a so-called "punishment attack" in the nationalist New Lodge area of north Belfast on Saturday.
Police found a man aged 22 shot in one leg and with cuts to his head and face on Falls Road in west Belfast just before 3 a.m. on Saturday. A crowd outside a bar ran off as the officers approached to find the man on the ground.