Ahead of next Sunday's election for a 500-plus member assembly to rewrite the constitution and give the president more power, the opposition also plans a general strike -- the second in weeks -- on Wednesday and Thursday and a big protest march on Friday.
It all makes for a dramatic week in the opposition's dogged drive to unseat the socialist Maduro, whom it blames for an acute economic crisis marked by shortages of food, medicine and such basics as soap and toilet paper.
"Let them lock us all up. The fight must move forward," said Freddy Guevara, the deputy speaker of the opposition- controlled congress.
"The people of Venezuela must fuel the general strike. They must come to Caracas and help us prepare for the civic boycott," Guevara told a news conference. He insisted his supporters will not resort to violence.
More From This Section
Next Sunday's vote is supposed to be for a 545-seat constituent assembly that will draw its members not from political parties but rather social sectors that the opposition sees as loyal to Maduro, a former bus driver who was the handpicked successor of late socialist firebrand Hugo Chavez.
"I demand this of all the opposition leaders," Maduro told state TV.
On Saturday night he issued a warning about the vote and how the opposition behaves next weekend: "We will be relentless if they try to generate a process of violence in order to stop that which cannot be stopped."
Maduro also said Sunday on his weekly TV program that 33 judges whom the opposition-controlled congress designated Friday as a sort of shadow Supreme Court will be arrested. One of them was already arrested Saturday.
The Supreme Court said that in swearing in shadow judges, congress overstepped its bounds and committed treason.
Of the 33 shadow justices, Maduro said: "One by one, one after another, they will all be arrested. All of them will have their assets and accounts frozen, all of it. And no one is going to defend them.