Guinea’s security forces shot in the back two unarmed civilians and beat another person to death during clashes in the capital before and after disputed presidential elections this month, Amnesty International said.

The fighting pitted allies of President Alpha Conde against opposition supporters. Conde won the majority of votes in the Oct. 11 election to win a second term at the helm of the world’s largest exporter of bauxite. Second-place finisher Cellou Dalein Diallo and other contenders have said the vote was marred by fraud.

In separate incidents, a 20-year student was clubbed to death by baton-wielding security officials, while a driver and a carpenter were shot from behind, said Amnesty in an e-mailed statement on Thursday, citing interviews with family members and eyewitnesses.

The riots also led to the deaths of three other people in Conakry and injured at least another 80, the London-based rights group said. Outside the capital, seven others died. The killings took place between Oct. 8 and Oct. 13.

Government spokesman Albert Damantang Camara said by phone that he couldn’t comment because he hadn’t yet seen Amnesty’s report. Several calls to the phone of Security Minister Mahmoud Cisse didn’t connect.

The election was only the second democratic one since 1958 in Guinea. The vote in 2010 was marked by widespread violence and several deaths.

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