(CNN) Two leaders of an all-boys Catholic school in Toronto have resigned as police investigate cases of sexual assault.

President Jefferson Thompson and Principal Greg Reeves are leaving St. Michael's College School, the school said in a statement. It cited their desire to let the school move forward without distractions.

Toronto police this week arrested six male students for alleged sexual assault of other male students. Some of the incidents were caught on tape.

Charges of assault, gang sexual assault and sexual assault with a weapon were filed against each of the suspected students, said Inspector Dominic Sinopoli, who leads the sex crimes unit. The school serves students in grades seven through 12, its website states

Police learned about the assault last week and believe the incident happened this school year, he said. Authorities are investigating other possible crimes, he said, telling reporters Tuesday that the department has as many as four videos.

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