This statement was made by Elliott Abrams, the U.S. special representative for Venezuela, during his speech in the house of representatives, the resource LIGAnews.
However, he said that the Russian aircraft have been seen in the skies over Venezuela, but the Russian troops in the country. Also Abrams did not rule out that Russia may use in Venezuela, elements of the hybrid war.
In the American media in early January 2019 appeared information that the representatives of the Cheka arrived in Caracas for the protection of Nicolas Maduro. However, the fact of the presence of mercenaries from Russia to Venezuela, the Kremlin has not confirmed.