MISSISSAUGA, Ont. -- Ontario's police watchdog says it is investigating an injury sustained by a 21-year-old woman who was hit by gunfire during an incident in Mississauga that also left a man dead and two police officers injured.

The Special Investigations Unit says it is continuing to probe the death of a 22-year-old man who was fatally shot on March 20 during an interaction with police in the city just west of Toronto.

The watchdog agency says it has also been investigating the injury sustained by Suzan Zreik as part of the entire investigation, adding Zreik was interviewed by SIU investigators about her injuries on March 23.

The agency says the man was shot multiple times after Peel Regional Police were called to a building and that he was pronounced dead at the scene.

It says Zreik, who was in her home at the time of the incident, sustained a gunshot wound and was taken to hospital for treatment.

Peel Regional Police have said one of the officers was shot and the other was stabbed, and described their injuries as serious.

The SIU says it has assigned five investigators and three forensic investigators to the case.

The arm's-length agency investigates reports involving police where there has been death, serious injury or allegations of sexual assault.