Jovic is currently ahead of Zeljko Komsic from the Social Democratic Party with a small margin, given that according to preliminary results from 53 municipalities out of 81 municipalities in Bosnia's Croat-Muslim entity, the former has won 11.83 percent of votes and the latter 11.41 percent.
On the other hand, the victory of Silajdzic as the prospective Bosniak (Bosnian Muslim) representative and of Radmanovic as the Serb representative is likelier.
The SIP will announce preliminary results for the two entities' law-making bodies and for assemblies in the federal (Muslim-Croat) entity on late Monday owing to a complex system of the electoral process.
The largest number of polling stations in Bosnia-Herzegovina which opened at 0700 hrs Sunday for the general elections, closed at 1900 hrs Sunday, and after that the counting of ballots started, the SIP chairman, Branko Petric, said in Sarajevo on Sunday evening.
Petric said that only a small number of incidents had occurred at several polling stations which did not affect the voting process.
According to preliminary returns from 126 municipalities which were sent to the SIP by 2100 hrs Sunday, the turnout was 43.9 percent.
The highest turnout of 83 percent was registered in the central Bosnian town of Kresevo.
In the city of Zenica, a mere 37 percent of eligible voters went to the polls.
The returns from 16 more municipalities are being expected and this can change the figures on the turnout at these general elections.
Upon the closing of the polling stations, representatives of major political parties in the country mainly expressed satisfaction with the course of the voting.
An official of the Bosnian Croatian Democratic Union (HDZ BiH) said that this party would score the victory, and also its main rival, the HDZ 1990 said it won the elections.
Major party representing interests of Bosnian Muslims (Bosniaks) - the Party of Democratic Action (SDA), the Party for Bosnia-Herzegovina (SBiH) - expressed conviction that their candidates had won in the race.
The Bosnian SDP - Social Democratic Party - said it had achieved that it had planned for the elections.
Commenting on the organisation of the elections, a prominent local human rights activist, Srdjan Dizdarevic, said that the voting was in line with democratic standards.
Bosnians went to the polls in general elections on Sunday to choose leaders who will guide their country after a decade of international administration.
About 4,300 voting stations in the country were opened for 2.75 million eligible voters. The voting proceeded without any major problem.
Voters cast ballots to elect the state collective presidency and parliament as well as the president and two vice-presidents in the Serb entity. Voters from the Federation of Bosnia-Herzegovina (the Croat-Muslim entity) voted for deputies in the House of Representatives in the Federation Parliament and for representatives in assemblies in ten cantons.
Thirty six (36) political parties, eight coalitions and 12 independent candidates ran in the elections for the country's collective presidency and the national parliament.
The three-member presidency consists of representatives of the three constituent peoples: Bosniaks, Croats and Serbs.
Six candidates stood in the election for each Bosniak and Croat member of the presidency, while even 11 candidates competed for the post of the Serb representative.
Voters from the Bosnian Serb entity also directly voted for the president and two vice presidents, as well as for representatives to the Republika Srpska parliament.
According to some estimates from July this year, there were nearly 4.5 million residents in Bosnia.
Bosnian Muslims or Bosniaks account for almost 49 percent of the population. Serbs are the second largest constituent people (about 37 percent), and Croats are the smallest constituent people accounting for 14 percent.