CHICAGO (CBS) — Investigators believe someone deliberately set fire to several cars on the Southwest Side early Thursday.

The Chicago Police Bomb and Arson Unit was called to investigate after three cars were torched near 634d and Kildare. One vehicle was parked on the street, two others were in a nearby alley.

When firefighters arrived on the scene shortly before 3:30 a.m., an SUV parked on the street was fully engulfed in flames. Investigators believe the fires were intentionally set.

Neighbors said two of the vehicles belonged to one person. He owned an SUV that was parked on Kildare, and another parked down the alley on 63rd, about a block away. Flames from the second SUV spread to a red car parked next to it.

Christian Nava, whose car suffered minor damage to its bumper, said his father woke him up around 5:30 a.m., to tell him his car had been damaged by the fire.

“I woke up, and we came over and checked it out, and it turns out this car was on fire, and it got some of our car on fire too.

Police said the fires were set intentionally, and the arson was gang-related.

No injuries were reported.