A total of 6,771,479 eligible voters could vote at 8,390 polling stations, including 38 in 22 foreign countries, between Boris Tadic of the ruling coalition's Democratic Party and Tomislav Nikolic of the opposition Serbian Progressive Party.
The turnout by 7 pm was the same as the turnout in the presidential runoff in 2004, when the two candidates were also Tadic and Nikolic, CeSID programme manager Marko Blagojevic told Tanjug news agency.
He expects the final turnout to be between 45 and 46 per cent, and said the election passed peacefully and without irregularities that could affect its outcome.