Police investigating dissident terrorist activity have arrested four men and recovered a firearm and ammunition in west Belfast.

A 29 year old man was arrested on the Grosvenor Road last night after a vehicle was stopped.

An assault rifle and ammunition were also recovered.

In a follow-up operation, three men aged 27, 29 and 46 were arrested in the Springfield Road area.

All four men are being questioned at Antrim police station.