Police said they believe the recovery of a rocket launcher "has saved lives".
The Police Service for Northern Ireland has has been on high alert after a series of attempts by republican dissidents to kill members of the security forces.
These weapon systems are clearly intended to kill and we should be in no doubt that the recovery of these items has saved lives.
More top news
Cool and breezy for the time of year
The people behind the moving tribute marking 100 years since the Battle of the Somme were unknown - until now.
Gunmen have stormed a restaurant in Dhaka, Bangladesh, taking a number of hostages and opening fire at police. Here's what we know.