Some senior military officials are defecting from Venezuelan President Nicolas Maduro's camp and pledging allegiance to opposition leader Juan Guaido. As Mike LeCouteur reports, it's seen as some form of progress by Venezuelans eager for the political tides to shift.

Troops loyal to President Nicolas Maduro violently drove back foreign aid convoys from Venezuela’s border on Saturday, killing two protesters and prompting opposition leader Juan Guaido to propose that Washington consider “all options” to oust him.

Trucks laden with U.S. food and medicine returned to warehouses in Colombia after opposition supporters failed to break through lines of troops, who dispersed them with tear gas and rubber rounds, injuring dozens. Witnesses said masked men in civilian clothes also shot at protesters with live bullets.

“Today’s events force me to make a decision: to formally propose to the international community that we must have all options open to secure the freedom of our country,” Guaido said on Twitter.

The United States has been the top foreign backer of Guaido, who invoked Venezuela’s constitution to assume an interim presidency last month and is now recognized by most Western nations as the OPEC nation’s legitimate leader.

President Donald Trump has in the past said military intervention in Venezuela was “an option,” though Guaido made no reference to it on Saturday.

Venezuela’s Guaido will meet VP Pence in Bogota:

Venezuelan opposition leader Juan Guaido said he will meet U.S. Vice President Mike Pence at a meeting Monday of regional diplomats.

The emergency meeting of foreign ministers from the so-called Lima Group of mostly conservative Latin American nations was organized to discuss Venezuela’s crisis. It will take place in Colombia’s capital of Bogota.

Guaido, who the U.S. and some 50 nations recognize as Venezuela’s rightful leader, spoke from Colombian city of Cucuta alongside President Ivan Duque after a day of deadly clashes with security forces blocking the entry of humanitarian aid amassed on three of Venezuela’s borders.

While insisting he wouldn’t give up in his fight to deliver the aid, he didn’t ask supporters to continue risking their lives and make another attempt to break the barricades set up by President Nicolas Maduro’s socialist government.

But he did make one more appeal to troops to join the opposition’s fight for power.

“How many of you national guardsmen have a sick mother? How many have kids in school without food,” he said, standing alongside a warehouse where some 200 tons of mostly U.S.-supplied boxes of food and medicine has been stockpiled.