A man is being questioned by PSNI officers investigating dissident republican activity.

The 36-year-old was arrested in Newry this morning and has been taken to the Serious Crime Suite at Musgrave Police Station.

A property was also searched as part of the crack down.

A 35 year old man arrested in west Belfast yesterday has been released unconditionally.

While three other men, ranging in age from their 30s to their 40s, remain in custody.