The peaceful demonstrations drew several hundred people, mostly singing or praying, as well as a large police presence.
Nine were electrocuted as they tried to loot a bakery during chaotic anti-government protests Thursday night in Caracas, according to Venezuelan Communications Minister Ernesto Villegas.
Three others were fatally shot, and an additional death was reported, but details were not immediately available.
Six people also suffered gunshot wounds as other businesses, including two liquor stores, were looted, and attacks were reported in the city's metro system, Villegas said.
The death toll from incidents related to the protests this month has jumped to at least 22 people.
Within the first two weeks of April, six people were killed during anti-government protests. Three others were killed Wednesday in a series of protests that opposition leaders described as the "mother of all marches."
Clashes between supporters of the opposition and those of President Nicolas Maduro have flared this month in Venezuela. The opposition is asking Maduro to step down, accusing him of eroding democracy.
On March 29, the Venezuelan Supreme Court dissolved parliament
and transferred all legislative powers to itself. The court later reversed its decision, but protests had already begun.
Tensions have risen as Maduro called protesters "vandals and terrorists," and security forces used cannons and tear gas canisters.
The Human Rights Foundation has condemned the deaths.
"The democratic world must stand firm in support of the young men and women in Venezuela who are risking their lives for freedom and democracy by rejecting Nicolas Maduro's dictatorship," Thor Halvorssen, the foundation's president, said in a statement.