Jubilant supporters poured onto the streets of Venezuela's capital Caracas to celebrate the victory of President Hugo Chavez.
Mary Reina, a 62-year-old Chavez supporter who lives in the hillside slum where the president cast his vote said: "I'm celebrating with a big heart. Chavez is the hope of the people and of Latin America."
Chavez, 58, took 54.42 percent of the vote, with 90 percent of the ballots counted, compared with 44.97 percent for young opposition candidate Henrique Capriles, the electoral authority said.
More top news
MPs say there must be no way back for the former London mayor as he hints he could seek to rejoin the party.
President Donald Trump has requested that the Justice Department investigates whether the FBI infiltrated his campaign.
High pressure will help keep conditions relatively quiet through the course of this week.