It said that Venezuelans have the right to demonstrate peacefully and "to see the political conflict immediately solved".
Members of the opposition-controlled National Assembly showed up at the National Guard's headquarters in Caracas early Tuesday to deliver a document denouncing the government response to the protests.
Eighteen people were detained Monday, and Venezuela's Interior Minister Nestor Reverol said officers would continue to be deployed around the country.
Tensions in Venezuela have escalated recently as people flooded the streets protesting the leftist regime of President Nicolas Maduro.
Nine people, including two teenagers, were arrested for breaking into an office of the Supreme Court and vandalizing it at the end of Saturday's march.
In the latest clashes in the once-booming oil exporter, riot police in Caracas fired tear gas at stone-throwing demonstrators - whose leaders vowed not to let up the pressure on Maduro.
An 87-year-old woman was reported to have died in her apartment in the Colinas de Bello Monte neighbourhood after inhaling tear gas thrown by police during street demonstrations. However renewed protests were also called this past weekend after former opposition presidential candidate and current Miranda Governor Henrique Capriles Radonski was banned from holding office for fifteen years by the Comptroller General's office for "illicit administrative practices".
Salute to Chuck Berry opens Rock Hall ceremony
He thanked his brothers in Pearl Jam , and in his other band, Soundgarden (another glaring omission from the Rock Hall, by the way).
Anti-government demonstrations have repeatedly been held in Caracas in recent to protest against a recent decision by the Supreme Court to temporarily assume some responsibilities of the National Assembly as long as the legislature continued to be "in contempt" of the constitution.
Meanwhile, the opposition in Venezuela is planning to stage mass anti-Maduro protests on April 19 in what Guevara called the "mother of all protest marches". Illegal wildcat marches have also been held by the MUD opposition coalition, which has accused the government of reacting with "repression" to the unrest.
Mr Capriles has been at the forefront of demands for a recall referendum on President Maduro and was seen as the opposition's best hope in next year's presidential election.
For its part, the national government has rejected the violence and says that the opposition is deliberately promoting chaos in a bid to bring about regime change in Venezuela.
Gerardo Blyde, mayor of the borough of Baruta in the capital Caracas, said police dropped tear gas canisters from helicopters, a claim that was repeated by government human rights liaison Tarek William Saab.
Venezuelans have been suffering food and medicine shortages for months, leading many to skip meals or go without crucial treatment.