CHICAGO (STMW) — A 41-year-old Chicago man died Monday night while aboard a plane bound for O’Hare International Airport, authorities said.

Christopher Allen, of the 3500 block of West Jackson Boulevard, was taken to Resurrection Medical Center after he was found unresponsive aboard the the Spirit Airlines flight, which landed about 10:50 p.m., authorities said.

He was pronounced dead at 11:39 p.m., according to the Cook County Medical Examiner’s office.

Authorities said Allen died at some point during the flight, though police could offer few other details. His cause of death has not been determined.

A death investigation was underway, police said.

(Source: Sun-Times Media Wire © Chicago Sun-Times 2013. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

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