In a pre-taped video, the group of more than a dozen men in military-style uniforms said they were seeking to restore constitutional order and called for Maduro to step aside in favor of a transitional government.
The opposition is boycotting the vote, saying the election rules have been rigged to favor the ruling socialist party and will only serve to tighten Maduro’s grip on power.
Critics say the assembly, whose election rules appear designed to ensure a majority for Maduro, is intended to institutionalize dictatorship in the South American nation, a member of OPEC.
Mass marches were also planned for Monday and Friday in an effort to force President Nicolas Maduro into aborting a controversial July 30 election for a new congress.
The dozen or so legislators, all in their late 20s or early 30s, belong mainly to the Justice First and Popular Will parties, which are promoting civil disobedience. They do not receive salaries since funds to the National Assembly were squeezed.
The protesters who attacked the fence outside La Carlota airbase in the wealthy east of Caracas, earlier burned a truck and a motorbike when security forces broke up a march destined for the attorney general’s office.
Speaking at a military event Tuesday, Vladimir Padrino Lopez said he didn’t want to see “one more national guardsman committing an atrocity on the street.”
The student was shot in the head and killed during a confrontation between police and protesters.
The death toll climbed to 21 after a student was fatally shot in the city of San Cristobal, authorities, said on Tuesday.
Dismissing Venezuelan governments accusations as baseless, the US said Venezeula is trying to distract world attention by blaming them.