04/30/2015 05:03 EDT | Updated 08/07/2015 02:59 EDT

Man shot by police in Cambridge after domestic violence call

A man, a woman and a police officer are in hospital this morning after police responded to an early-morning domestic violence call to a home in Cambridge, Ont.

One of the Waterloo Regional Police officers who responded to a call at a townhouse at 95 Morning Calm Dr. shortly after midnight Wednesday became involved in an altercation with a man.

The man was shot by police and the officer was stabbed.

"This incident revolves around a relationship between a 30-year-old male and a 30-year-old female who were in a common-law relationship until recently," said John Ansell, the lead investigator with the province's Special Investigations Unit,

"Yesterday morning, Wednesday, the female reported a domestic assault to the Waterloo Regional police, who filed a report," 

Ansell said the man returned to the home around midnight, broke in and assaulted the woman.

CBC cameraman Tony Smyth, who was on the scene early Thursday morning, said the woman was stabbed multiple times.

Ansell said police arrived on the scene shortly after the assault.

"When the police arrived, they encountered the male in front of the home behind me, and during the encounter, the police officer was stabbed," said Ansell. "The officer responded with a firearm, and the male was shot."

The man and woman have been taken to a Hamilton hospital with serious injuries, and are undergoing surgery, according to Ansell. 

The officer was taken to a local hospital with non-life-threatening stab wounds. Ansell says she is in stable condition and is likely to be released later Thursday morning.

The Waterloo Regional Police Service's homicide detectives and its domestic violence unit are investigating. 

The SIU — which conducts an independent investigation whenever police officers are involved in incidents where someone has been seriously injured, dies or alleges sexual assault — will also investigate.