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A 20-year-old aspiring airline pilot and a Texas couple traveling with their two young children are among the nine people killed when a private jet plunged into a South Florida neighborhood Sunday.

The Learjet 60 departed Austin-Bergstrom International Airport at about 10:37 a.m. and was headed to North Eleuthera in the Bahamas when it crashed in Palm Beach County shortly before 1 p.m., killing everyone on board.

Federal investigators said Monday that weather conditions are a "major focus" of the investigation after the crew reported icing and moderate turbulence at about 35,000 feet shortly before the jet rapidly lost altitude.

PRIVATE JET WITH 9 PEOPLE ON BOARD CRASHES JUST MILES FROM MAR-A-LAGO

The National Transportation Safety Board also said there are preliminary indications that the aircraft may have begun breaking apart before impact.

A Learjet 60 crashed into a South Florida neighborhood Sunday afternoon (Palm Beach County Fire Rescue)

The cause of…