Ontario's Special Investigations Unit says a Waterloo region police officer has been charged with sexual assault in connection with alleged incidents that took place several years ago.

The SIU did not provide details on the alleged incidents, which it says took place between October 2010 and December 2012.

Waterloo Regional Police say an alleged incident took place in 2010 while the officer was off-duty and was reported last November, at which point the SIU became involved.

Police say Sgt. Caleb Roy, a 26-year member of the force, is charged with one count each of sexual assault and breach of trust by a public officer.

The force says Roy, who worked with the Criminal Investigations Branch, has been suspended since last November.

The SIU is an arms-length agency that investigates incidents involving police in which someone is killed, injured or accused of sexual assault.