"[The Russian military personnel] has arrived to take part in bilateral consultations," the source said when asked about the possible arrival of two aircraft with the Russian military.
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The source noted that there was "nothing mysterious" about that because the visit was directly related to contracts that had been signed by the two countries years ago.
"Russia [and Venezuela] have a number of contracts, which are being implemented, including contracts on military and technical cooperation," the source added.
Meanwhile, Venezuela has been suffering from a severe political crisis for around two months, after the leader of the country's opposition, Juan Guaido, illegally proclaimed himself interim president, contesting the re-election of Venezuelan President Nicolas Maduro last year.
The self-proclaimed interim president immediately received support on the part of the United States, which has also denounced Maduro's re-election, along with a number of other countries. Both Caracas and Moscow have been expressing concerns that Washington may resort to military means to oust Maduro from power.
China, Cuba, Russia and a number of other countries have endorsed Maduro as Venezuela's only legitimate president.