Philadelphia police are searching for a suspect after four of the department’s vehicles were set on fire early Monday morning.

The individual is described by law enforcement as a white male who was last seen wearing flannel, a backpack, and a bandana, according to Fox29.

Investigators told the station that most of the fires began on the tires of the vehicles, which were parked in four different neighborhoods across the city.

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Officers are now being told not to leave their cruisers unattended, Fox29 reports.

Although the four vehicles suffered fire damage, there were no reported injuries from any of the incidents.