U.S. Secretary of State Antony Blinken said the Biden administration had "serious concerns" about Maduro's victory.

President Nicolás Maduro accused opposition leader María Corina Machado and presidential candidate Edmundo González of “criminal violence” and a close ally called for their arrests.

A demonstrator catches fire after the gas tank of a police motorbike exploded during clashes in a protest against Venezuelan President Nicolas Maduro, in Caracas on May 3, 2017.