Principal Allan Buggie of Lord Tweedsmuir Secondary in Surrey, British Columbia, said officials learned from Facebook posts and interviews with students that a small group of seniors had made a game out of trying to seduce eighth-grade girls, the Canadian Broadcasting Corp. reported Friday.
"It's not known how many Grade 8 girls may have actually been involved in any way with this activity," Buggie wrote in the May 10 letter, which was sent to the parents of 11th- and 12th-grade boys and eighth-grade girls.
Buggie said an organization called SafeTeen was brought to the school to hold workshops and counseling sessions for all eighth-grade girls.
Police Constable Peter Neily said boys could face charges for such activities.
"A 13-year-old, if they engage in sexual activity with someone, let's say 17 (years old) ... they are entering into a situation where consent cannot lawfully be given and it is a sexual assault," he said.