York Regional Police say that a man living at a house on Oakhurst Drive woke up at 4 a.m. to the sound of breaking glass.
The homeowner quickly extinguished a small fire that started. Police say the house suffered minor damage.
Investigators have since determined that the front window was broken first and then a suspect attempted to throw the device through it.
Police want to speak with anyone who saw suspicious vehicles or individuals on Oakhurst Drive this morning. Investigators can be reached at 1-866-876-5423, ext. 7441. Information can also be passed on to police through Crime Stoppers at 1-800-222-8477.