The three break-ins happened on residential streets near Bloor Street and Highway 427.
One of the break-ins occurred on Markwood Drive, where residents were home when someone tried to break into their house just before 5 a.m.
Two other break and enters were reported on nearby streets, one around 12:30 a.m., the other just before 4 a.m. Police believe the three break-ins are related.
Mike, a resident on Markwood Drive, awoke to discover someone in his house.
"The light went on in the bedroom, and I saw a baseball cap kind of poke out from the door and I jumped up and said 'There's somebody in the house.'" Once I realized somebody was in the house I jumped up and made chase."
He was unable to catch the suspect. The items taken from his house, mostly camera equipment, were found outside the house.
The suspect entered the house through an unlocked basement window.
At one point, K-9 units were pursuing a suspect who managed to evade police.