Angola’s Constitutional Court threw out a complaint filed by the runner-up, opposition party Unita, in the Aug 24 election.

Unita, a former rebel group who fought the ruling MPLA for nearly three decades, received many of its votes from youths who feel left out of the country’s oil riches.

Analysts fear their anger could boil over into violence if they answer Unita’s calls for protests starting on Sept 24.

Security was tight throughout the capital Luanda today and Unita, whose leaders did not attend the inauguration, decried the heavy police presence as an effort to stifle protest.

Just over 51% of the electorate voted for the former Marxist MPLA.

Unita meanwhile took about 44%, its best result yet.

“We will work on policies and good practices to incentivise and promote the private sector of the economy to … create more jobs for Angolans, but specially for young people,” Lourenco said, draped in the black and red of the Angolan flag.

He added that the MPLA would “guarantee peace, stability and economic and social development”, but gave no further details.

Lourenco acknowledged the polls had been “the most disputed elections of the history of the young Angola democracy”, but he said they had nonetheless “contributed to the strengthening of our democracy”.

Lourenco, 68, has pledged to press on with reforms in his second term, including privatising poorly run state assets and continuing to clean up corruption after investigating wealthy and powerful members of the Dos Santos family.

But his reforms have so far failed to create a fairer distribution of Angola’s vast oil wealth, which remains mostly in the hands of a few well-connected MPLA officials.