SHOW LOW, Ariz. — A driver in a pickup plowed into bicyclists during a community road race in Arizona on Saturday, critically injuring several riders before police chased the driver and shot him outside a nearby hardware store, authorities said.

Six people were taken to a hospital in critical condition after the crash in the mountain town of Show Low, about a three-hour drive northeast of Phoenix, police said. Helmets, shoes, and crumpled and broken bicycles were strewn across the street after the crash, and a tire was wedged into the grill of the truck, which had damage to its top and sides and a bullet hole in a window.

Two other people went to a hospital themselves, city spokeswoman Grace Payne said, and one of the severely injured was later flown by medical helicopter to a Phoenix-area hospital. The suspect, a 35-year-old man, also was hospitalized in critical but stable condition.

“We don’t know the motivation,” Payne told the Associated Press. “We know he fled the scene.”