Six airlines cancelled flights to Venezuela on Saturday, an industry group said, after the U.S. aviation regulator warned of dangers from "heightened military activity" amid a major buildup of American forces in the region.

Spain's Iberia, Portugal's TAP, Chile's LATAM, Colombia's Avianca and Brazil's GOL have suspended their flights to the country, said Marisela de Loaiza, president of the Venezuelan Airlines Association (ALAV).

She did not specify how long the flight suspensions would last.

Panama's Copa Airlines, Spain's Air Europa and PlusUltra and Venezuela's LASER are continuing to operate flights for now. Turkish Airlines said Sunday it was canceling flights from November 24-28.

The U.S. Federal Aviation Administration on Friday urged civilian aircraft in Venezuelan airspace t

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