BUFFALO GROVE (CBS) — A 57-year-old northwest suburban man has been charged with sexual assault and two counts of sexual abuse for two incidents involving 15-year-olds, police said.

According to Buffalo Grove police, a 15-year-old boy’s father reported to police over the weekend that his son was sexually abused by a male adult. The investigation determined that another 15-year-old, whose gender was not specified, was abused by the same adult. The incidents occurred between Aug. 8 and 19 in Buffalo Grove, police said.

The investigation led to Herbert Mallalieu Burgess, 57, of the 2300 block of South Lexington in Mount Prospect, according to Buffalo Grove police. He was charged with criminal sexual assault and two counts of criminal sexual abuse, according to police.

Burgess is scheduled for a preliminary hearing in Waukegan on Aug. 31.

(Source: Sun-Times Media Wire © Chicago Sun-Times 2010. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)