Electoral officials in Haiti say Rene Preval's lead in Tuesday's presidential election has dipped below the 50 percent needed for an outright victory.
Haiti's election council said late Saturday that Preval, a former president, has 49.6 percent of the vote, with about three-quarters of the ballots counted. Another former president, Leslie Manigat, is second with about 12 percent.
Hours earlier, thousands of Preval supporters cheered and chanted as they marched from the Cite Soleil slum through Port-au-Prince.
International observers say the election was free and fair. But candidate Charles Baker, who has about 8 percent of the vote, has called for an investigation into reports of people voting multiple times.
Some information for this report was provided by AFP and AP.