A man is facing numerous charges relating to the sexual assault of minors in southwestern Ontario.

Police say they received allegations about an incident in Norfolk County and that investigators then discovered more alleged sexual offences against minors in that area and in Niagara Falls between 2002 and 2013.

A 37-year-old man from Mattawa is charged with seven counts each of sexual assault on a person under 16 and sexual interference with a person under 16.

He also faces six counts of invitation to sexual touching of a person under 16 and one count of indecent act on a person under 16.

Police said in a release that "The investigation is ongoing and police would like to speak with anyone who has information related to the investigation." Anyone with information is asked to contact the Norfolk County OPP Crime Unit at 1-888-310-1122.