Angolan President Joao Lourenco is to be sworn in for a second term on Thursday amid tight security after a disputed electoral win last month.
The inauguration will be held on the historic palm tree-lined Praca da Republica square in the centre of the capital, Luanda.
Security forces set up a heavy cordon around the venue ahead of the ceremony, AFP correspondents saw, which the main opposition party said was aimed at stifling dissent.
Around 20 military tanks were stationed at a large traffic circle, around a kilometre from the square.
Large numbers of police and military forces had started patrolling the streets on the eve of the ceremony.
"This set up aims to intimidate citizens who want to demonstrate against the election results on the day of the inauguration of a president without legitimacy," the National Union for the Total Independence of Angola (UNITA) said in a statement.
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The guest list for the ceremony is strictly by invitation and limited to some 15,000 selected Angolans and 50 foreign heads of state and government, State Minister Adao de Almeida told reporters.
Lourenco, 68, returned to power after the August 24 vote gave his Popular Movement for the Liberation of Angola (MPLA) a thin majority, winning just 51.17 percent of the votes.
The vote was to choose members of parliament, where the leader of largest party automatically ascends to the presidency.
It was the MPLA's poorest showing in the oil-rich African country it has controlled since independence from Portugal in 1975.
UNITA -- a former rebel movement which fought a bitter 27-year civil war against the MPLA government -- made significant gains, earning 43.95 percent of the vote, up from 26.67 percent in 2017.
Opposition parties and civic groups say the vote was marred by irregularities.
UNITA disputed the results in court but its appeal was tossed out.
"Tomorrow I will stay at home. There are too many police forces around town," Joao, a high school student who only gave his first name, said Wednesday at a bus stop on the outskirts of Luanda.
'President of all'
Under its charismatic leader Costa Junior, 60, UNITA has proved popular in urban areas and among young voters eager for economic change.
It did particularly well in the capital, where it won a majority for the first time.
The MPLA instead lost its two-thirds parliamentary majority with its seats dropping to 124 from 150.
Lourenco struck a conciliatory tone after the vote, pledging to promote "dialogue" and be the "president of all Angolans".
But Costa Junior has said he will skip the inauguration and promised protests against the result of the vote, but has said his party will join the new parliament.
Foreign observers from other parts of Africa praised the peaceful conduct of the polls but raised concerns over press freedom and the accuracy of the electoral roll.
The former general first came to power in 2017 when he took over from long-time ruler Jose Eduardo dos Santos, who bequeathed a country deep in recession and riddled by corruption and nepotism.
Lourenco swiftly turned on his predecessor, launching an anti-graft campaign targeting his family and friends, which critics say was a political stunt.
He also embarked on an ambitious reform programme to lure foreign investors and diversify the economy.
But that has so far failed to brighten the prospects of many of Angola's 33 million people who are mired in poverty.
Dos Santos died in Spain in July. State funerals for the late strongman were held in August in the same square where Lourenco is to be sworn in.
Analysts see little change between Lourenco and his predecessor.
"There is not much difference between two... in terms of respect for human rights and fundamental freedoms," said Borges Nhamirre, a researcher at the Pretoria-based think-tank Institute for Security Studies.