Three people were reportedly killed and dozens wounded after a series of explosions in the Burundian economic capital, Bujumbura.
According to witnesses, at least two grenades exploded in a bus parking area, causing panic.
A third explosion targeted a market and a fourth grenade exploded near a packed bus in the suburbs, BBC News reports.
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This event follows a deadly grenade explosion in a bar in the Burundian capital, Gitega, and a mortar attack at Bujumbura airport on Saturday, which a rebel group (RED-Tabara) said it carried out.