A 16-year-old driver of a Ford F-Series pickup truck is under investigation after striking six cyclists in Waller County, Texas while allegedly trying to roll coal.

Click 2 Houston reports that the accident happened just after 10:30 a.m. on Saturday morning, September 25. A group of cyclists were traveling along U.S. Route 290 at the time while training for a local Ironman event.

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Chase Ferrell was traveling behind the group of cyclists and told local media that the driver of the pickup was rolling coal across the cyclists, repeatedly accelerating and braking to blow black soot from the truck’s exhausts across the group.

“A kid in a black truck attempted to ‘roll coal’ us where they accelerate past blowing diesel exhaust on cyclists,” Ferrell said. “It made me mad, so I accelerated to try to catch up to him, so I could take a picture of his truck, take a picture of him or his license plate or something.”

Soon after, Ferrell says the 16-year-old driver of the Ford hit six of the cyclists. While the cyclists were treated at a local hospital and released, some of them suffered shoulder, back, and neck injuries and are expected to require follow-up surgeries.

“When I pulled up on the scene, I thought I was going to be pulling up to people that were dead,” Ferrell said. “It’s senseless. It doesn’t make any sense for anybody to do that to any cyclist… it’s pointless.”

Click 2 Houston states that the 16-year-old driver spoke to officers on the scene but was not arrested. Local police have confirmed this is indeed the case, stating that the accident is still under investigation.