A child fell off a roller coaster at Idlewild Park & SoakZone in Pennsylvania on Thursday, Westmoreland County officials said.
The child, whose name and gender have not been released, was flown to Children’s Hospital of Pittsburgh with unknown injuries, a Westmoreland Public Safety spokeswoman told TIME. The incident took place at 12:18 p.m. and the child’s immediate family was there at the park.
Before he was airlifted to the hospital, the boy was conscious and treated on site, Idlewild Park said in a statement on Thursday. The park also said the boy fell from the Rollo Coaster, a ride that opened in 1938 and requires riders to be at least 36 inches tall.
“Our thoughts and prayers are with the boy and his family. A full investigation has begun to determine the cause of the incident,” the statement said. “The Rollo Coaster will be closed pending the results of the investigation. We are fully cooperating with area agencies in this investigation.”
Idlewild Park is located about 50 miles east of Pittsburgh and has been open since 1878.
This incident comes after other accidents at fairs and amusement parks this summer. In one, three girls were injured in Tennessee after their Ferris wheel basket flipped over, and in another, a 10-year-old boy in Kansas was decapitated while riding a water slide in Kansas City.
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Write to Abigail Abrams at abigail.abrams@time.com