A runaway golf cart injured five people near the 16th hole at Pebble Beach Golf Links during the second round of the 119th U.S. Open on Friday, according to the California Highway Patrol.

The CHP said a vendor drove the golf cart loaded with boxes to a concession stand near the 16th hole and parked it around 1:20 p.m. ET. When the vendor climbed out, a box fell on the cart’s accelerator and caused it to move.

Witnesses said the unoccupied cart drove in large circles until someone jumped on it and knocked the box off.

A woman who said she witnessed the accident told Golf.com that she was standing in a line at the concession stand when the cart started moving.

“We were standing in the concession line on the 16th hole when all of a sudden there was a runaway cart and one guy running after it, then a bunch of people running after it,” Georgie Salant told Golf.com. “It was actually coming straight for the concession line, and then it turned, just on its own, and it didn’t stop. It started driving in circles. It ran over, like, five people.”

The USGA released a statement about the incident but indicated that only three spectators and the vendor were hurt.

“Unfortunately, during today’s second round there was an incident involving a golf cart on the 16th hole that resulted in three spectators and a vendor being injured and requiring medical treatment. We will continue to monitor their conditions,” the USGA said.

Five people in total were injured. One person broke their arm, one had a spinal injury and the rest had a variety of minor injuries.

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