Former Marxist guerrilla Jose Mujica got the most votes in Sunday's poll, and will face former president Luis Alberto Lacalle in a Nov. 29 run-off vote, CNN reported Monday.
"We have ahead of us 30 days that are a fight but are not filled with hate for anyone," CNN quoted Mujica as telling a boisterous crowd in the capital.
Local news reports said that with 60 percent of the vote counted, Mujica held 47.4 percent of the vote while Lacalle registered 29.2 percent. Third-place candidate Pedro Bordaberry told his supporters he had conceded and reportedly urged them to vote for Lacalle.
The U.S. broadcaster said Mujica is known to his supporters as El Pepe. He, like popular current Uruguayan President Tabare Vazquez Rosas, is a member of the Broad Front Party and is considered a leftist.