Two loyal people from ruling party were killed in the centre of Burundi, a local official and witnesses said on Saturday.
The conflict escalated in Burundi when President Pierre Nkurunziza announced last April that he will be seeking a third term as president, despite the constitutional two term limit.
After the decision, Burundi was faced with protests in the streets that led to a failed coup in May and internal clashes that continue to claim lives.
Nkurunziza supporters and protesters clashed in the streets with guns, rockets and bombs in the capital, Bujumbura.
"Armed criminals arrived on a hill straddling Gacimbirigongo and ordered the locals to come out of their houses," said Celestin Singirankabo, the head of the commune of Gisozi where the town is located.
"They called out two people by name and asked them to step forward and then shot them dead," he said, adding that a probe had been launched.
More than 400 people have died in the violence and at least 230,000 have fled the country.