A woman was taken to hospital Saturday night after an altercation with police in Red Lake, Ont.
Ontario Provincial Police say they were called to a residence just before 9 p.m. CT. It was the second time that evening police had been called to that location for a noise complaint.
According to a news release, the woman refused to let officers through the door, but told them she had consumed "an unknown quantity of medication." The officers then broke down the door.
An altercation took place, and one of the officers discharged a firearm.
The woman was taken to hospital and treated for an injury.
Two officers were also taken to hospital and later released.
Provincial police say they have notified the province's Special Investigations Unit, which has "invoked its mandate."
The SIU is called in whenever police officers are involved in incidents in which someone has been seriously injured, dies or alleges sexual assault.
Police deferred CBC's request for more information to the SIU, which has not yet responded to requests for an interview.