BLUE ISLAND, Ill. (AP) — More than a dozen cars of a freight train derailed Wednesday night just south of Chicago.

No injuries or leaks were reported and no hazardous materials were involved in the derailment around 9:30 p.m. at the Thornton Road and 136th Street crossing in Blue Island.

There were 13 cars that derailed and no hazardous materials were spilled.

The cause of the derailment was under investigation. Crews worked Thursday morning to clear the derailed cars.

The incident drew attention to about 40 cars parked at the back of the property where the derailment happened.

Nick Aarnavas said about 15 cars, belonging to a client, were parked in the back of his property and were damaged.

“Kind of shocked, I didn’t know what was going on,” Aarnavas said.

The Federal Railroad Administration monitored the derailment and Aarnavas said he is curious to learn how the CSX train came off the tracks.

“This turn here, this curve here, they’re usually doing like 1 or 2 miles an hour,” he said. “They’re never speeding so who knows what happened. We’ll find out sooner or later.”

As crews worked to upright the train cars, Blue Island police were there, but they weren’t there for the train. Police were focused on the damaged vehicles parked along the fence.

“Cause the suspicious nature of the vehicles all in one area at one time and it’s not a current tow yard in this area,” Blue Island Police Detective Nancy Bailey said.

BIPD said they were tipped off about the suspicious vehicles following the derailment and called in the Illinois State Auto Theft Task Force to assist.

Police were on scene for several hours and talked with the owner of the cars, who runs a business buying used vehicles and selling parts.

It was determined the vehicles were legally purchased and not stolen, however, they are illegally stored here.

Both the owner of the property and the owner of the vehicles face fines of up to $20,000.

The property owner said the railroad company will be covering the costs to fix his fence.

Recent derailments across the U.S. have raised concern about rail safety.

A March 30 BNSF derailment in southwestern Minnesota forced about 800 people from their homes. Ten cars hauling ethanol were among 23 that came off the tracks.

A Feb. 3 Norfolk Southern derailment outside East Palestine, Ohio, released hazardous chemicals that burned. Roughly half the town of about 5,000 people had to evacuate.