Leopoldo López

Guaido spoke to his sympathizers from an unknown location.

The Venezuelan opposition has received the Sakharov Prize for Freedom of Thought, which the European Parliament gives annually.

U.N. Secretary General Antonio Guterres has urged Venezuela's authorities to make "all possible efforts" to ease tensions and prevent further violence after two opposition leaders were sent back to prison, as the European Union also reacted against the move.

Venezuela's best-known jailed opposition leader Leopoldo Lopez celebrated a surprise return to his family after being granted house arrest on Saturday with a promise to fight on following three years' imprisonment for leading anti-government protests.  

Thousands of women dressed in white marched in Venezuela's capital on May 6 to keep pressure on President Nicolas Maduro, whose authority is being increasingly challenged by protests and deadly unrest.

Led by opposition leaders, lawmakers and Lilian Tintori - the wife of jailed opposition leader Leopoldo Lopez - the crowd carried flowers and placards denouncing "repression."  

Venezuela's Supreme Court on Feb. 16 upheld opposition leader Leopoldo Lopez's nearly 14-year prison sentence, a day after U.S. President Donald Trump called for his release.

Thousands donned white and took to the streets in cities across the country May 30 in the biggest show of frustration with Venezuela's socialist administration since a wave of bloody anti-government protests a year ago.