An SUV crashed into a restaurant in suburban Chicago on Monday, critically injuring a teenager and causing four other people to be hurt, authorities said.

A 14-year-old boy was outside the restaurant when he was struck by the SUV, which then collided with the wall of Fontano's Subs in Hinsdale around 2:30 p.m., news outlets reported.

The teen was transported to Hinsdale Hospital and then later flown to Comer Children’s Hospital at the University of Chicago, authorities said.

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Three other people inside the restaurant also were struck by the SUV or debris and were taken to a hospital in serious condition, authorities said. A fourth person was treated and released at the scene for minor injuries.

Police say the driver, who was not injured, was leaving a parking lot across the street when the accident occurred. Police are investigating what caused the crash. No charges were filed immediately.