The Navy is warning Oahu residents about possible increased traffic around Joint Base Pearl Harbor-Hickam on Oahu and at Pacific Missile Range Facility on Kauai this week during a four-day exercise this week. 

Navy Region Hawaii says Exercise Citadel Pacific 2012 is scheduled to start today and last through Thursday. 

Residents may also experience delays getting on to the bases, see increased security, and hear loud noises associated with the drills. 

This annual exercise is designed to train security to respond to threats.