Described by human rights groups as one of Africa’s most brutal dictators, Equatorial Guinea’s President Teodoro Obiang Nguema claimed he won 93.7 percent of the vote in Sunday’s election, BBC reported.

Election day was peaceful, observers said, but the opposition said at least 200 of its members were prevented from voting.

Obiang, 73, took power in a 1979 coup, ousting his uncle Francisco Macias Nguema and having him shot by firing squad, DW reported.

While the constitution has since been changed to impose term limits in the former Spanish colony, term limits don’t apply retroactively to him, according to BusinessInsider.

Africa’s longest serving leader, Obiang has been charged in French courts with allegedly using public funds to buy luxury homes and cars in France.

His son, Vice President Teodoro ‘Teodorin’ Nguema Obiang, has resisted attempts in the U.S. to seize his assets, denying charges that they were paid for with money embezzled from the state, CNN reported.

Human rights groups say Obiang has stayed in power by suppressing the media and dissident voices. They accuse him of widespread corruption.

Equatorial Guinea has become sub-Saharan Africa’s third biggest oil producer, with oil revenues accounting for more than 70 percent of national income, MGAfrica reported. But the wealth has not trickled down. Despite a reported per capita income exceeding $10,000, 75 percent of the country’s 760,000 people are among the world’s poorest, MGAfrica reported.

The country ranks 144th out of 187 countries listed on the U.N.’ 2014 Human Development Index.

When he kicked off his re-election bid, Obiang threatened people against avoiding the polling stations. “I am the candidate of the people. Whoever does not vote for me is rejecting peace and opting for disorder,” he said at a rally in the capital Malabo, MGAfrica reported.

Turnout was also 93.7 percent. Seven candidates ran for president but no one expected Obiang to be challenged, DW reported.

Obiang heads a coalition of 10 parties that includes the ruling Democratic Party of Equatorial Guinea. “We are a benchmark in democratic terms,” he said, according to DW.

His two closest rivals – Bonaventura Monsuy Asumu and Avelino Mocache Mehengap – each won 1.5 percent of the vote, according to officials.

The Democratic Opposition Front coalition of dissident groups boycotted the vote.

Commission chief Clemente Engonga admitted to anomalies, saying the number of votes cast in some areas exceeded the number of registered voters.

“These were the worst elections ever organised in this country,” Asumu said. He ran for the fourth time, and said he had visited polling stations that had no ballot slips on voting day.

Another unsuccessful candidate, Gabriel Nse Obiang Obono, told AFP on Tuesday that he and 200 of his supporters had been prevented from leaving his Malabo home since the previous Friday.

In the last election in 2009, Obiang claimed to have won 95.37 percent of votes. In 2007, he won by 97.1 percent, MGAfrica reported.