A detective with the Ontario Provincial Police has been charged with four counts of sexual assault, the police watchdog announced Thursday.

Det.-Sgt. Todd Amlin serves in the OPP's Middlesex detachment. Amlin was arrested Thursday by members of the province's Special Investigations Unit.

The SIU was contacted by the OPP this past June regarding complaints made by a woman. The charges relate to alleged incidents that happened between 2009 and 2011.

In a statement from the Director of the SIU, Tony Loparco said there are "reasonable grounds to believe that an Ontario Provincial Police (OPP) officer with the Middlesex detachment committed criminal offences."

Amlin has been released on several conditions, including that he refrain from communicating directly or indirectly with the complainant.

Amlin is scheduled to appear in court in Orillia on Jan. 15, 2019.