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Joe Epstein, Associated Press
A firefighter walks along the northbound lanes of Interstate 287 looking for pieces of a small plane that crashed Tuesday morning, Dec. 20, 2011 on Interstate 287 in Harding, N.J. Two New York City investment bankers are among the five dead in the small plane crash, which left debris on the highway and local streets, forcing the police to close the highway to conduct their investigation. The FAA says the plane departed Teterboro Airport for DeKalb Peachtree Airport near Atlanta Tuesday when there was a garbled transmission and it disappeared from the radar.

MORRIS TOWNSHIP, N.J. — Crews have removed a large section of plane from a tree a quarter-mile from where the aircraft crashed on the median of a New Jersey highway. All five aboard were killed.

Crews are cleaning wreckage scattered over an area of at least half a mile as investigators seek clues to why the single-engine plane went down Wednesday on Interstate 287.

The National Transportation Safety Board plans to examine all the wreckage at a warehouse in Delaware.

Shortly before the plane crashed, the pilot was discussing ice conditions with an air traffic controller. The NTSB says investigators don't yet know if weather played a role.

Killed were two investment bankers heading for Georgia, a wife of one of them, and two children. No one on the ground was hurt.