Planes not allowed to depart from Los Angeles International airport; arrivals unaffected

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Planes are not being allowed to take off at Los Angeles International Airport.

Airport spokeswoman Nancy Castles said Wednesday afternoon that the Federal Aviation Administration had put a "ground stop" on departures. Arrivals were still being accepted.

Castles wasn't sure what caused the problem. An FAA spokesman did not immediately respond to a request for comment.

Los Angeles International is the nation's third-busiest airport.