The drummer in Canadian prime minister Stephen Harper's band has been charged with five counts of sexual assault and five of sexual interference with a minor.
Police said they started an investigation last November looking at a complaint of sexual assault on a minor by a teacher.
They said there are concerns there may be other victims.
A spokesman for Mr Harper said the prime minister's office is "shocked and disturbed" by the charges and had not been made aware of any such allegations.
Nolan was the drummer for Harper's band, Herringbone.