Bujumbura - A grenade blast wounded 26 people on Thursday in the Burundian capital, Bujumbura, police said.
An attacker threw the grenade from a motorcycle in the central neighbourhood of Buyenzi, according to witnesses.
Police spokesman Pierre Nkurikiye said nine of the victims were in serious condition.
The East African country has been gripped by political violence since President Pierre Nkurunziza announced in April that he would seek a third term in office, and won an election in July.
In New York, the UN Security Council was working on a resolution to strengthen the United Nations' political presence in Burundi, said Matthew Rycroft, British ambassador to the UN, noting that the crisis needs to remain in the forefront following a visit by the council last month.
“It's crucial that part of keeping the spotlight on the issue is about building up the UN presence in Burundi,” Rycroft said.
More than 400 people have been killed in protests, clashes and attacks, while about 240 000 people have fled Burundi, according to the UN.
DPA