The Union for Democracy and Social Progress won 69 seats in the 500-member DR Congo National Assembly, surpassing 44 other political parties, the Independent National Electoral Commission announced.
This was followed by the Union for the Congolese Nation party, led by the president Tshisekedi's ally, Economy Minister Vital Kamerhe. It won 36 seats.
Other political parties, headed by Tshisekedi's supporters, including Senate President Modeste Bahati Lukwebo and Defense Minister Jean Pierre Bemba, secured 35 and 17 seats respectively.
The Together for the Republic party, led by opposition leader Moise Katumbi, emerged as the primary opposition force, securing 22 seats.
The opposition, however, said the results of the election must be annulled. Some opposition presidential candidates also planned to hold a demonstration to protest the alleged election violations. For their part, DRC authorities dismissed two legal challenges to the interim results, noting that the opposition lacked evidence to support its claim that the vote counting process compromised the fairness of the election.