Calgary police said two people were rushed to hospital from the community of Huntington Hills on Friday after a violent incident they believe was domestic in nature.
Officers were called to the 1000 block of 72 Avenue Northwest just before 4 a.m.
When they arrived, police found a woman who appeared to have been assaulted and a man with what appeared to be a self-inflicted stab wound.
EMS said both the man and woman were transported to Foothills Medical Centre in potentially life-threatening condition with multiple traumatic injuries.