The United States military says it will dispatch a military hospital ship to the Venezuelan region, the latest sign of greater US involvement in the crisis gripping the South American country.
President Donald Trump has invested considerable political capital in the diplomatic and economic intervention in the Venezuela crisis.
The administration also continues to work on other responses to increase financial pressure on Maduro, including "secondary sanctions" on companies from other countries that do business with Venezuela, and additional shipping sanctions for oil, the official said.
A group of protestors in downtown Dallas on Tuesday demanded that the US stop meddling in Venezuela. I feel the same way. While US officials have previously dangled what they called "off ramps" for those hit with sanctions who abandon Maduro, this is the first time the Trump administration has made good on its pledge.
The Russian Foreign Ministry also said in a statement on the same day that Lavrov had warned of the "gravest consequences" of "aggressive steps" against Caracas in a call with Pompeo.
Speaking to the BBC, he said he would "evaluate all options" to oust President Nicolas Maduro.
Russia, on the other hand, is opposing any US military involvement.
Arreaza told reporters "at present, there is a commission of (Russian) specialists in Venezuela, it could be expanded".
"We call on both the Americans and those who support them to drop irresponsible plans and act exclusively within the frames of worldwide law", Lavrov added.
Moreover, as U.S. National Security Advisor John Bolton has pushed for a more aggressive policy on Venezuela, he "has angered some within and outside the White House", according to a report of the Washington Post.
Pence will offer new "carrots" to the Venezuelan military, the senior official told Reuters, declining to provide details of the incentives ahead of the speech.
Pence offered the possibility of relief from US -imposed sanctions to Maduro regime leaders who denounce their president and aid the opposition.
Guaido last week tried to provoke a military revolt to force Maduro from office, but the attempt failed as most of the armed forces remain loyal to Maduro.
After his failed attempt to overthrown Maduro, Guaido welcomed the discussions of military options in the United States, calling them "great news", as he spoke to The Washington Post. Analysts believe Guaido and the USA are running out of options, but they say military action may not be the right answer.