A man was seriously injured after a car slammed into a commercial building in Scarborough early Saturday, Toronto police say.

The collision occurred on Middlefield Road, between Compass Court and Scottsfield Drive, according to Katrina Arrogante, spokesperson for the Toronto Police Service.

Emergency crews were called to the scene at 5:27 a.m.

Police are still trying to determine why the collision occurred.

Toronto paramedics said the man, who was driving the car, was taken to hospital with serious injuries. Police said the injuries are possibly life-threatening.

Police have closed Middlefield Road at McCowan Avenue as officers continue to investigate the collision.

Police are still trying to determine how the collision occurred. (Garry Asselstine/CBC)