Police say people in the north of the Island shouldn't be alarmed if they spot lots of police this afternoon.
Officers from the firearms unit is carrying out training in the North of the Island today.
The organisation says it's a planned exercise and the public should not be concerned.
It says people may see an increased police presence or hear noise linked to the exercise.
Firefighters tackle three incidents in one afternoon
List of buses running during today's strike action
Hospital bed occupancy falls
More driver services to go online
How many people come here without visas?
Temporary traffic lights on TT course
Weather warning for icy patches
Government's empty buildings queried by MHK