In the country's National Assembly polls, candidates backing outgoing DRC president Joseph Kabila had secured 288 of the 429 seats so far declared, with 141 going to the opposition.
Parties supporting outgoing Democratic Republic of Congo president Joseph Kabila won a majority in long-delayed legislative elections, according to an AFP tally of results released on Saturday, as the opposition sought a recount of the disputed presidential poll.
Pro-Kabila parties had passed the 250-seat threshold required to secure a majority in the 500-seat national assembly, according to collated results from the Independent National Election Commission (CENI).
More than 15,000 candidates were running in the poll, which determines who will control parliament for the next five years.
Pro-Kabila candidates had secured 288 of the 429 seats so far declared, with 141 going to the opposition.
On Friday, the outcome of the tempestuous presidential election appeared to be headed for the courts after the poll's runner-up said he would demand a recount.
The runner-up in the election, Martin Fayulu, appealed to the Constitutional Court to annul the provisional result, his lawyer said Saturday.
The request was filed on Friday ahead of a 48-hour deadline for any appeals against the shock result to replace Kabila.
Provisional results released on Thursday gave Felix Tshisekedi, a rival opposition candidate, 38.57 percent of the vote, just ahead of Fayulu with 34.8 percent.
Emmanuel Ramazani Shadary, the candidate backed by outgoing President Joseph Kabila, came a distant third with 23.8 percent. Turnout on the day stood at 48 percent.
The declared result was a surprise to many.
The few pre-election opinion polls had flagged Fayulu as the clear favourite while Kabila critics predicted the outcome would be rigged in favour of Shadary rather than an opposition figure.
The powerful Roman Catholic church bluntly said CENI's provisional result "does not correspond" with data that its 40,000 election monitors had collected at polling stations.
Fayulu's bloc on Friday said he was the true victor, claiming he had garnered 61 percent of the vote.
Candidates have 48 hours after the result to file any appeal, and the Constitutional Court has a week in which to deliberate.
"We don't expect the election to be annulled, but [a decision in favour of] a recount," Fayulu said.
TRT World's Frank Ucciardo has more.
Democratic Republic of the Congo has been in the grip of a two-year political crisis triggered by Kabila's refusal to step down when his two-term constitutional limit expired at the end of 2016.
Elections to choose a successor were delayed three times before finally taking place on December 30.
Polling day unfolded relatively peacefully, but suspicions over the count have deepened.
The turmoil has darkened hopes that the country will have its first peaceful handover of power since it gained independence in 1960.
DRC is a giant, straddling central Africa over an area the size of continental western Europe.
Rich in minerals but mired in poverty, the country has suffered two major wars in the past 22 years, as well as bloodshed in elections in 2006 and 2011 that saw Kabila returned to office.
International reactions to the results have been guarded.
Most leaders have issued statements appealing for any disputes to be resolved peacefully, but notably lacking any congratulations for Tshisekedi.
Speaking by videoconference to the UN Security Council on Friday, CENI chief Nangaa appealed for "the new authorities to be supported by the international community."
But Bishop Marcel Utembi, the head of the Catholic church's conference of bishops, urged the Security Council to ask CENI to release the records of vote-counting at polling stations to allow for verification.
Analysts said it was likely Kabila, 47, had sought to avoid a backlash and international condemnation if Shadary had been declared winner.
He therefore struck a deal with Tshisekedi, head of the country's oldest and biggest opposition party, according to this scenario.
As a quid pro quo, some commentators suggested, Kabila would gain immunity from prosecution for his iron-fisted 18-year rule, and protection from asset seizure.
Thursday's pre-dawn announcement brought thousands of Tshisekedi supporters onto the streets in celebration, while others who had backed Fayulu came out to protest.
Eight people – five civilians and three militiamen – were killed on Thursday in Kikwit, a Fayulu stronghold in the west of the country, when police tried to suppress post-election unrest, according to an updated official toll. The previous tally was five dead.
Seventeen police were injured, national police spokesman Colonel Pierrot-Rombaut Mwanamputu told AFP, adding that a relay station of the national radio and television broadcaster, RTNC, had been ransacked by demonstrators.
CENI has still to announce the result of legislative elections which also took place on December 30, with more than 15,000 candidates in the running.
The result will determine who will hold a majority in the 500-seat parliament for the next five years.
The outgoing National Assembly, which took power in 2011, is currently dominated by Kabila supporters who, even ahead of the announcement, were already claiming to have won a majority.
CENI was expected to unveil the results on Friday, but the announcement has already been postponed from Wednesday and the timing is uncertain.