According to Delta officers, a man and a woman were fighting in front of a private elementary school on Wednesday around 3:05 p.m. when an off-duty officer saw them and attempted to break up the fight.
When the officer intervened, the man stabbed both the woman and the officer.
During the incident the private school, Immaculate Conception Delta elementary school, went into a lock down.
No children were harmed, but B.C. Emergency Health Services stated that two people were transported to the hospital in critical condition.
The suspect was arrested and remains in police custody.