Gunmen wearing military uniforms on Tuesday evening attacked a military camp at Kiyenzi, some 20 km east of the Burundian capital Bujumbura, a local official has said, Xinhua reported.
"The attack targeted Kiyenzi military post at about 18:30 (local time). During the fighting, two assailants were killed and three soldiers injured," Dieudonne Bizimana, a senior adviser to the governor of Bujumbura province, told Xinhua.
Local residents have been asked to leave their villages because the clashes "are still going on", he said, adding soldiers are pursuing the assailants.
The attack comes after massive clashes between gunmen and soldiers in the northern provinces of Kayanza and Cibitoke near the border with Rwanda in July.
During those clashes, 31 assailants were killed and 170 others captured, according to the army