A helicopter lifts off at Pocono Raceway carrying race car driver Justin Wilson after he was involved in a crash. (AP Photo/Mel Evans)

IndyCar driver Justin Wilson was severely injured Sunday when he was struck in the head by a large piece of debris from a crash during a race in Pennsylvania. The 37-year-old Englishman was airlifted to a nearby hospital after he was hit by the nose cone off a car driven by Sage Karam, who had spun out and hit a wall.

IndyCar issued this update:

IndyCar driver Justin Wilson suffered a severe head injury during today’s event at Pocono Raceway. Wilson is currently in a coma and in critical condition while undergoing further evaluation at Lehigh Valley Health Network in Allentown, Pa.

IndyCar sends its thoughts and prayers to Justin, his family and Andretti Autosport during this difficult time.

IndyCar added that “additional updates to Wilson’s condition will be released when available.” Ryan Hunter-Reay, who also races for Andretti, won the event, and he held a very subdued version of the usual victory celebration.

“All I know is that he was unconscious, he was not responding and he was airlifted,” Hunter-Reay said (via the Associated Press). “That’s all very bad. I’m very worried right now.”

“It’s just a tough one right now,” said Michael Andretti, car owner for Wilson and Hunter-Reay. “Our thoughts and prayers are with Justin right now. We’re going to see. Hopefully he’s okay.”

Stefan Wilson, Justin’s younger brother and also an IndyCar driver (although he was not competing in Sunday’s event) said, via Twitter, “I have no update on his condition, he’s been moved to the local hospital, and I’m trying to get there to be with him. Please don’t speculate.”

Other drivers tweeted out their thoughts: