The president of the committee created by Maduro for the activation of the Constituent Assembly, Elías Jaua, said on Sunday that they invited different sectors of Venezuelan civil society including the opposition, to explain the scope of the proposal.
"This march is against opposition terrorism, they are destroying everything", said cook Fredesvilda Paulino, 54, at a pro-government rally also in Caracas on Saturday where red-shirted women waved pro-Maduro flags and banners.
Gunshot wounds have been the most common cause of deaths.
USA media had reported that Holt, a Mormon former missionary recently married to a woman living in Caracas, was taken away by police who allegedly planted weapons in his apartment.
The family of an imprisoned high-profile Venezuelan opposition leader on Friday urged the International Committee of the Red Cross to visit the penitentiary where he is being held and verify his health status and the conditions of his confinement. The opposition has vowed to keep up protests for as long as needed to achieve its main demand of fresh elections.
U.S. President Donald Trump's national security adviser, H.R. McMaster, met with Venezuelan National Assembly President Julio Borges in Washington on Friday to discuss the ongoing crisis and need for the government to adhere to its constitution.More news: Korea open to US dialogue under 'right conditions'
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Women have often been feeling the brunt of Venezuela's economic crisis due to widespread food and medicine shortages, huge lines at shops, soaring prices, and increasing hunger in the nation of 30 million people.
Henrique Capriles, one of the most outspoken opposition leaders, said on Friday that 85 members of the National Guard in Caracas had been arrested for repressing opposition demonstrators, and he added that their relatives asked him to publicize the arrests.
Tens of thousands of women and others marched throughout the streets of Caracas on Saturday, shouting "we want elections!" and offering security forces, who occasionally attempted to intercede, roses, Reuters reported.
"Eighty per cent of Venezuelans want elections as a way out of our nation's grave economic and political crisis", wrote Ernesto Padrino on Facebook.
Five people have been killed in Venezuela's unrest since late Monday. Opposition leaders claim that the government will handpick a group of supporters to get away with rewriting the Constitution and to instate their dictatorship publicly. "We have big doubts about this video and we don't accept it as proof of him being alive".
The ICRC didn't immediately respond to emailed questions about the lawyers' request.