The F.B.I. is investigating whether the crash of a small plane in East Hartford, Conn., that killed a passenger on Tuesday was intentional, according to four federal law enforcement officials.

The pilot, who survived the crash, told investigators that it was not an accident. The officials spoke on the condition of anonymity because the investigation was continuing.

Officials identified the passenger as Feras M. Freitekh, 28. Public records show he had lived in Orland Hills, Ill., about 35 miles southwest of Chicago. Federal Aviation Administration records show he was issued a private pilot certificate on May 29, 2015, and was certified to fly a single-engine plane.