Toronto police are investigating a pair of overnight stabbings in the city.Investigators were first called about an altercation in the area of Lawrence Avenue East and Markham Road in Scarborough before 3 a.m. Sunday.When they arrived they found a man suffering from a stab wound. He was taken to the hospital with injuries that are considered serious but not life-threatening.There was no immediate suspect description available.Then, just after 3 a.m., police say a man was located suffering from stab wounds in the Queen Street West and Denison Avenue area.He was taken to the hospital with non-life-threatening injuries.No suspect description was immediately available.