Suffolk County police are trying to determine how a 17-year-old boy who reported himself shot in a robbery Tuesday in East Moriches was really injured.

Police said the boy was found with a chest wound at about 3 p.m. at Inlet View Path and airlifted to Stony Brook University Hospital. He remained hospitalized Wednesday in stable condition, Suffolk County police said.

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The wounded boy called 911 to report he had been shot during a robbery, police said, but in a statement Wednesday police said it is not clear what happened.

"After a thorough investigation, the case has been determined to be noncriminal," the statement said. "We are not looking for a suspect, and we do not believe there was a robbery involved. The exact nature of how the victim received the wound is under investigation by the Seventh Squad detectives."

With John Valenti and Ellen Yan