South Salt Lake police Wednesday were questioning a suspect in connection with three arson-caused car fires in front of a business.

Just after 7 p.m. Tuesday, police and fire crews were called to two vehicles set on fire at Anytime Emissions, 2967 S. State.

After the fires were put out, investigated and crews left the scene, a third fire was spotted at the business about 9:20 p.m. by a South Salt Lake police officer driving in the area. The officer also spotted a man running across the street from the business and detained him, said detective Gary Keller.

The man was questioned and released, but investigators Wednesday still considered him a suspect.

Detectives also found a fourth vehicle that had a window broken out but was not set on fire. In each of the incidents, someone piled combustible materials on a front seat and set them on fire, said South Salt Lake Fire Battalion Chief Terry Addison.

There was no indication that anything was taken from the cars before the fires were set, Addison said. A motive was not known Wednesday.

The vehicles were older, and damage to all three that were set on fire totaled about $5,000, with the majority of that happening to just one vehicle, he said.