U.S. President Donald Trump on Wednesday called on Russia to pull its troops from Venezuela and warned that "all options" were open to make that happen.

The arrival of two Russian air force planes carrying nearly 100 Russian troops outside Caracas on Saturday has escalated the political crisis in Venezuela.

Russia and China have backed President Nicolas Maduro, while the United States and most Western countries support opposition leader Juan Guaido. In January, he invoked the constitution to assume the country's interim presidency, arguing Maduro's 2018 re-election was illegitimate.