Venezuela's opposition and outside observers are disputing the government's account that more than 40 percent voted to elect members to rewrite the country's constitution, saying the turnout was half of that.
Security forces and protesters fought around Venezuela on Thursday in streets blocked by burning barricades and a supporter of socialist President Nicolas Maduro was shot dead, the sixth fatality from more than a week of violence.
Venezuelan security forces arrested opposition leader Leopoldo Lopez on Tuesday on charges of fomenting unrest that has killed at least four people, bringing tens of thousands of his angry supporters onto the streets of Caracas.
Venezuelan police fired teargas and turned water cannons on stone-throwing protesters on Saturday to stop them blocking a Caracas highway in a fourth day of sporadic unrest against President Nicolas Maduro's government.
A Venezuelan opposition leader wanted by police in connection with deadly street protests told supporters via Twitter to keep demonstrating, but peacefully, and armed police visited his father's home, apparently seeking to arrest him.