Police in the Democratic Republic of Congo's capital fired tear gas for a second straight day on Wednesday to break up violent protests outside parliament over proposed changes in the judiciary.

The proposals come from the Common Front for Congo (FCC), a coalition close to Kabila, who remains a behind-the-scenes force in national politics.

But Tshisekedi's party on Monday lambasted it as a ploy to "undermine the independence of the judiciary and increase the power of the justice ministry".

Separately, four influential grassroots organisations on Wednesday issued a joint statement warning that the country's next presidential elections in 2023 were at risk of "manipulation" because of moves to appoint a new head of the national electoral commission.

The joint statement warned against any attempt by the FCC-dominated parliament to push through Nangaa's successor, and called on the public to oppose "any Machiavellian plan aimed at thrusting us into endless electoral crises."