Police say they have arrested two people and are searching for a third in connection with two fires they allege were deliberately set in September at a Mississauga apartment building.

Occupants of one unit were allegedly targeted in both fires, which happened on Sept. 20 and 21 in a third-floor hallway of 920 Inverhouse Apartments, located near Lakeshore and Southdown roads, Peel police said in a news release Thursday.

The second fire caused a large-scale evacuation, displacing several residents. Police said 18 residents were also transported to hospital to be treated for smoke inhalation. No significant injuries were reported in either fire.

Damage from the fires is estimated at approximately $1 million, police said.

Police said Thursday they had arrested Joshua Pedersen, 28, on Oct. 15. The Hamilton man, who has no fixed address, is facing six charges, including two counts of arson with disregard for human life. A second person, 27-year-old Morgan Murphy of Burlington, was arrested last week and is facing four charges, including two counts of arson with disregard for human life.

Police are continuing to search for another person wanted in the investigation, 30-year-old Madison Varga of no fixed address.

Anyone with more information is asked to contact Peel police.