It is understood a police officer has died at a station in Portrush.
A Police spokesperson said officers were investigating the sudden death of a colleague on Friday, February 10.
A post-mortem examination is expected to take place.
It is understood the deceased was a part-time officer.
Commenting on the incident, Chief Superintendent Paula Hilman said: “Our thoughts and sympathies are with the family and friends of our colleague. They have asked for privacy during this difficult time.”