|Provisional results may be released December 6, with final results scheduled for December 17
Joseph Kabila, the Democratic Republic of Congo's incumbent president, leads nearest rival Etienne Tshisekedi with votes from about half of election stations counted after last week's elections, the nation's electoral commission has said.
Kabila had 4.9 million votes to Tshisekedi’s 3.4 million, as 53 per cent of the sites reported results, Daniel Ngoy Mulunda, leader of the Electoral Commission, said on Sunday.
But concerns over voting irregularities and fears of further violence have prompted some people to leave Kinshasa, the capital, ahead of the expected release of official results on Tuesday, according to an immigration official.
The official said that more than 3,000 people had left the city over the weekend for Brazzaville, the capital of neighbouring Congo.
Al Jazeera's Azad Essa, reporting from Kinshasa, witnessed hundreds of people gathering in the city's port to make the journey across the river to Brazzaville on Monday.
|Crowds boarding a ferry from Kinshasa to neighbouring Brazzaville across the Congo river [Azad Essa]
"Locals are saying that the number of people crossing the river is not extraordinary, but the difference is the amount of luggage that is being taken," he said.
"Most people are going to use the excuse that it is trade that they are carrying, locals have said.
"They can't say 'it's a holiday' because there aren't any at the moment.
"Security in the port is tight. Most who are crossing the river are going as a precautionary measure, in case violence breaks out."
Some locals fear that the border will be closed sometime tomorrow and hotels are booked out in Brazzaville.
"Kinshasa is not the place to be right now," Rika, a 24-year-old Congolese national, said, adding that she will go to Brazzaville for four days.
Violence has marred the elections in the conflict-stricken country, with at least 18 civilians killed and 100 wounded from November 26 to 28, according to Human Rights Watch, the New York-based group.
Most of the dead were shot by the Republican Guard, Kabila’s security force, the group said.
Call for calm
The African Union, EU, UN and international election monitors have called for calm when results are announced.
The DRC's influential bishops meanwhile warned on Sunday that the political situation reminded them of "a high-speed train going straight toward a wall".
Tshisekedi said on Saturday he rejected the early vote count, and warned Kabila and Daniel Ngoy Mulunda, the election commission chief, to "respect the will of the Congolese people".
"If they don't, they risk committing suicidal acts. I call all our people to stay vigilant so that if needed they can execute the orders I will give them," he said.
The third-place candidate, former national assembly speaker Vital Kamerhe, threw his support behind Tshisekedi and said he also rejected the early figures.
Several cities and regions have taken action already in an effort to pre-empt further unrest.
Authorities in Mbuji-Mayi, the capital of the Tshisekedi stronghold of Kasai Oriental, have imposed a night time curfew, while Kabila's presidential guard has been deployed in the restive southeastern city of Lubumbashi.
In Kinshasa, the government ordered cell phone providers to block text message services on their networks until further notice, after a flurry of election-related rumours swirled via SMS.
Benjamin Bajikijaie, president of the Commission of Election Surveillance (CSE), an organisation within leading opposition candidate Tshisekedi's UDPS party, told Al Jazeera that the suspension of short message services was disturbing their attempts to collection information.
"We are monitoring the elections and collecting our own data from polling stations across the country who were sending us information through sms, but the cancelation of services are causing major operations hassles for us," Bajikijaie said.
International officials close to the process have begun whispering that the election commission may not be able to meet Tuesday's deadline.
David Pottie, from the Carter Center said that completing the count by [Tuesday] "will take a tremendous amount of work".
Pottie told Al Jazeera that the monitoring team had not completed their assessment of the entire electoral process, but had issues with the level of transparency and lack of ready information.
"It has been difficult to follow that results from the level of the polling station, through the various processes through to the compilation centers, where entire region results are released," he said.
"Theoretically, CENI have the results from individual polling stations, but publishing a compilation of results rather than individual stations make it difficult to see if the results add up. Parties have to rely in their witnesses and others who have to physically go to polling stations and record the amount of vote so they have something to compare with."
"Information the best ventilation in alleviating rumours, but little of that so far ... and in many places just 50 per cent have been counted," he said.
While in South Africa, police fired rubber bullets on monday to disperse DR Congo opposition supporters in Johannesburg and arrested those who tried to storm their embassy in Pretoria, the Sapa news agency and an AFP correspondent said.
A group had gathered in front of the ruling ANC party headquarters to protest South Africa's alleged involvement in fraud in the Congolese elections, protesters told Sapa.
"South Africa does not have a preference of leadership in other countries. We leave it to the people of DRC to decide who it is they want to lead their country," Clayson Monyela, Department of International Relations and Cooperation spokesperson, told Al Jazeera.
"It is incorrect to say SA prefers one candidate over another. South Africa does not interfere in the internal affairs of a sovereign country."