A teenager was gravely injured after falling under an MTA train while “subway surfing,” authorities said. The incident happened in Queens, at the 111st Street station in Corona, at around 8:15 a.m. Friday,

A witness spotted the teen pre-teen recklessly riding on top of a No. 7 train at the 111th Street station in Corona around 8:15 a.m. when he fell off the side, authorities said.

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The boy was found lying in the northbound track bed at the 111th Street stop on the No. 7 train in Corona. Cops were called to the station after the teen fell at 8:17 a.m. and told by witnesses he

He was taken to NYC Health + Hospitals/Elmhurst, police said. An investigation into the incident is ongoing, according to authorities.

Police couldn’t immediately confirm if the boy was subway surfing at the time he fell under the train shortly after 8:15 a.m. at the 111th Street station in Corona.