President denis sassou nguesso
OPEC chief makes first trip to oil-rich Congo
During the trip, which will last until Wednesday, the secretary general of the Organization of Petroleum Exporting Countries will meet various government...
The 77-year-old retired general appears favoured to win a fourth term in Sunday's ballot. The largest opposition group, the Pan-African Union for Social Democracy, is already boycotting the ballot.
Mouamba, who resigned last week, is now charged with forming a new government, the statement said.
The appointment comes a month after the president was elected to a five-year term.
A heavy odour of the gas still hung in the air when a Reuters reporter arrived in the neighbourhood.
Nguesso is the latest long-serving African president to pursue legal action to prolong his grip on power.
Sassou Nguesso (71) is banned by the current Constitution from seeking another term.