People on, or living near, 12 Wing Shearwater in Eastern Passage are being advised that a training exercise on the base today could mean the sudden appearance of first responder vehicles and the sound of simulated gunfire.

The exercise is going on from 9:30 a.m. until 11 a.m. Wednesday.

The Canadian Armed Forces wants to alert the public this is only an exercise, and it "regrets any inconvenience."