"Secretary of State Michael R. Pompeo called Russian Foreign Minister Sergei Lavrov today, March 25 on the situation in Venezuela," Palladino said.
During the conversation, Pompeo told Lavrov that the United State would not stand by with respect to Russia's actions in Venezuela.
"The Secretary told Russian Foreign Minister Lavrov that the United States and regional countries will not stand idly by as Russia exacerbates tensions in Venezuela," Palladino said in the release. "The continued insertion of Russian military personnel to support the illegitimate regime of Nicolas Maduro in Venezuela risks prolonging the suffering of the Venezuelan people who overwhelmingly support interim President Juan Guaido."
The planes arrived in the Venezuelan capital on Saturday. Media earlier reported that an estimated 99 Russian military staff arrived in Caracas on board two planes, which also delivered 35 tonnes of cargo.
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.