Police are probing a suspicious fire at a Regent Park home that occurred early Saturday morning.

Several mattresses were set ablaze inside a first-floor bedroom at a housing complex near Dundas and Parliament Streets around 8 a.m.

Emergency crews pulled the burning beds from the unit and extinguished the flames.

Three people were at home during the fire and all escaped without injury.

Investigators suspect a visitor to the home may have ignited the blaze.

Forty arson fires have occurred in the GTA this summer alone.