Pro rally driver Ken Block has died following a snowmobile accident in Utah, authorities said late Monday.

The 55-year-old Park City, Utah, resident was riding a snowmobile on a steep slope in the Mill Hollow area, located east of Salt Lake City, when at about 2 p.m. his vehicle upended and landed on top of him, the Wasatch County Sheriff’s Office said in a statement.

Block was pronounced dead at the scene from injuries sustained in the incident, it said, adding that the state medical examiner’s office will determine the official cause of death.

“We are saddened to hear of the loss of Kenneth and our hearts are with his family and friends so deeply affected,” the office added. Block was riding within a group but was alone when the incident occurred, officials said.

The announcement came hours after Block had posted images of snow-covered snowmobiles as Instagram Stories to his verified personal account.

Hoonigan Industries, an apparel company, confirmed the death of its co-founder online. “Ken was a visionary, a pioneer and an icon. And most importantly, a father and husband,” it said in a statement. “He will be incredibly missed.”

Jenson Button, a former Formula One and Super GT Series champion, said via Twitter that he was shocked by news of Block’s death. “Such a talent that did so much for our sport,” Button said. “He was a true visionary with his own unique style & infectious smile. “Our sport lost one of the best today but more importantly, a great man.” Block began his rally career in 2005, winning five X Games medals in the process, along with numerous other awards in other competitions.

He was a huge inspiration to automotive enthusiasts and racers alike. His unique style and brand left an indelible mark on the industry, and he was always willing to get down with his fans and sign autographs, chat, and laugh with them.

Block was more than a rich entrepreneur and automotive geek. He was one of us. He was in love with rally racing and driving and taking a vehicle to the maximum performance.

He created a new context for the automotive lifestyle with his Hoonigan brand and Gymkhana videos that included some of the wildest stunt performances ever witnessed, and he put it all on film.

Our condolences to his family and friends.

RIP Legend.