Mozambique faces a crucial moment as its Constitutional Council prepares to announce final results of October’s contested elections on Monday, following weeks of deadly protests and opposition claims of electoral fraud.

The ruling party Frelimo’s candidate Daniel Chapo won over 70% of votes according to initial results, with opposition leader Venâncio Mondlane securing 20%. The election sparked protests that left at least 130 people dead, according to Human Rights Watch.

“On Monday the whole country must stop,” Mondlane declared in a Facebook broadcast Friday from an undisclosed location abroad. He claims to be the true winner and has threatened “chaos” if the Constitutional Council validates Frelimo’s victory.

European Union observers reported irregularities during vote counting and result alterations at local and district levels, declaring the election neither free nor fair.

Chapo, 47, is set to become Mozambique’s fifth president since independence, succeeding term-limited President Filipe Nyusi. Frelimo also increased its parliamentary majority to 195 of 250 seats.

The ruling party has maintained power since Mozambique’s independence from Portugal in 1975. Opposition candidate Mondlane, backed by the Podemos party, displaced the former rebel movement Renamo as the main opposition force.

Analysts expect Chapo, a lawyer, to maintain existing policies, including the fight against Islamist insurgents in the north and partnerships with international energy companies developing major gas projects.

The Constitutional Council will announce its ruling at 3 PM local time on Monday, amid heightened tensions and security concerns across the southeast African nation.