Toronto police have charged a math tutor and his fiancée with an alleged gang sexual assault of a 14-year-old girl.

Police allege the girl was assaulted at the couple’s home in the summer of 2014. They say the math tutor was her teacher “for a number of years.” The couple befriended the girl and she visited their home in the Lawrence Avenue East and the Donway East area numerous times.

Kevin Chan, 32, and Kayla Drumonde, 23, both of Toronto, are each charged with gang sexual assault and sexual interference.

In a news release, police said they believe there may be other victims. They provided a list of locations where Chan volunteered or worked as a private tutor.

Those locations are:

Dr. Norman Bethune Collegiate – Sept. 2000 to June 2001
200 Fundy Bay Blvd, Toronto

Avondale Public School – Sept. 2005 to November 2007
171 Avondale Ave, Toronto (volunteer teacher)

Willowdale Middle School – Sept. 2008 to March 2009
225 Senlac Road, Toronto

Flemington Public School - March 2009 to June 2009
10 Flemington Rd, Toronto

Light in the Attic Learning, 2011
124 Eglinton Ave W, Toronto

Spirit of Math (two locations) – Sept. 2011 to Aug. 2014
230 The Donway West, Toronto
9291 Markham Rd, Markham

Mathnasium of Don Mills – Nov. 2014 to Nov. 2015
189 The Donway West, Toronto

Anyone with information is asked to contact police at 416-808-7474, Crime Stoppers at 416-222-TIPS (8477), or online at www.222tips.com.