Demonstrators block the road in the rural village of Rwenza near Bujumbura, Burundi, Tuesday May 5, 2015. The Constitutional court validated President Pierre Nkurunziza's decision to seek a third term, amid street protests.(AP Photo/Jerome Delay)

Tit-for-tat attacks between Nkurunziza’s security forces and his opponents have escalated since April 2015. Thursday night’s attack struck a bar in Bujumbura’s Musaga neighbourhood, where protests were held against the president last year, said deputy police spokesman Moise Nkurunziza.

Among the dead were a three-year old child and an unarmed soldier who was in civilian clothes, he said. “It was around 10.10 pm last night when four armed men in civilian clothes attacked a small pub... killing five people,” he said. “As they were fleeing, the attackers threw a grenade at a small army base just nearby which didn’t do any damage.”