Authorities in Maui, Hawaii are investigating the discovery of a dead body in the wheel well of a United Airlines plane after it landed in Maui.

The airline and police department said in statements on Wednesday that the body was found in the wheel well of one of the main landing gears on flight 202, which arrived at Kahului Airport from Chicago on Tuesday, Christmas Eve. The airline said the wheel well of the Boeing 787-10 was only accessible from the outside of the aircraft, and that it was unclear how or when the person accessed it. The Maui Police Department said it was “actively investigating” the discovery of the dead body: “the Maui Police Department is currently conducting an active investigation regarding a deceased individual discovered on an incoming flight from the mainland this afternoon.”

In a statement to ABC News, United Airlines confirmed that “a body was found in the wheel well of one of the main landing gears.” United said the wheel well is only accessible from the outside of the aircraft and it’s not clear at this time how and when the unidentified individual accessed it.

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