PITTSBURGH — (WPXI) – Pittsburgh police have confirmed three of their marked vehicles caught fire this morning in the department’s Training Academy parking lot and the fire is considered suspicious. The building is located at 900 N. Lincoln Avenue in the city’s North Side neighborhood and the parking lot is located behind the building on Maolis Way. The fire was first reported around 3 a.m. No one was injured and there was no damage to the building. Police plan to use privately owned surveillance cameras in the area to learn who set the fire and how. The Fire Investigation Unit and Bureau of Alcohol, Tobacco, Firearms and Explosives are investigating.