Addressing a speech to troops, Maduro told the military "to be ready to defend the homeland with weapons in your hands if one day the U.S. empire dares to touch this territory, this sacred earth".
He added that the "United States wants to colonize the Latin America and the Caribbean region, using the Monroe Doctrine".
The armed forces say the chopper that crashed was heading to San Carlos in Cojedes state, near a military base where Maduro addressed cadets on Saturday.
Maduro is also seeking to shore up his support among the armed forces and visited a military base on Saturday for the third straight day.
The effort triggered two days of clashes between opposition supporters and government forces that left four people dead and hundreds injured.
In Barquisimeto, a group of women unsuccessfully attempted to pass on to National Guard troops a document containing Guaido's proclamation to the military to abandon Maduro.
"You know, I mean, a lot of the policies that we have put in place has kind of helped lead the devastation in Venezuela", Omar said at the time on the progressive show "Democracy Now!"
North Carolina Student Fought, Tried To Disarm Gunman, Saved Lives
Authorities identified the injured students as Drew Pescaro , 19; Sean Dehart , 20; Rami Alramadhan , 20; and Emily Houpt , 23. An Instagram, Facebook , or Twitter account owned/operated by the 22-year-old Trystan Andrew Terrell have yet to be found.
Venezuela's chief prosecutor Tarek William Saab announced on Friday the issuing of 18 arrest warrants for "civilian and military conspirators" involved in the failed uprising.
The fight started after Omar, earlier this week, held the Trump administration responsible for the escalating situation in Venezuela, where the opposition is trying to wrest power from the socialist government of Nicolas Maduro.
Tensions in Venezuela have soared since Guaido, the 35-year-old head of the National Assembly, invoked the constitution to declare himself acting president on Jan.23, claiming Maduro's re-election last year was illegitimate.
As recently as Friday, US President Donald Trump's security team met at the Pentagon to discuss potential options in dealing with the Venezuelan political crisis, with Secretary of State Mike Pompeo warning Maduro that he "is not someone who can be part of Venezuela's future".
"The president has his full range of Article 2 authorities and I'm very confident that any action we took in Venezuela would be lawful", Pompeo stated when asked if President Trump could intervene in the country's power struggle without congressional approval. "Honestly, I don't even feel like addressing the comment because it's not an informed one, it's not an intelligent one, it's silly, it's ridiculous and it's embarrassing".
"Oh the Russians - the Russians need to get out, too", Pompeo said. "Right now people are starving".