PAULS VALLEY — Four Norman North High School wrestlers were charged Monday with rape by instrumentation as a result of a police investigation into allegations two of their teammates were sexually assaulted on a bus.

The investigation found that “multiple acts of sexual assault” occurred Jan. 9 as the Norman North High School junior varsity wrestling team returned from a tournament that took place in Pauls Valley, police reported.

The victims are 16 and 12, police reported.