By Prime Ndikumagenge
The Burundian army has announced it will resume attacks on FNL rebels, who signed a ceasefire a week ago.
The FNL has continued to carry out attacks
Five people were injured, including three soldiers, after at least 11 mortar shells were fired on Bujumbura on Tuesday night.
The army said the attack proved the FNL, the last rebel movement still fighting, was not committed to peace.
A presidential spokesman says renewed conflict will not stop the government from pursuing talks with the FNL.
The attack on Bujumbura started just after midnight when mortar shells were simultaneously fired in Kanyosha and Mutanga, south and north of the capital.
A number of homes and cars were also damaged as mortars landed on their roofs.
This is the second incident since President Domitien Ndayizeye and FNL leader Agathon Rwasa signed an agreement committing their troops to stop hostilities on 15 May.
The FNL say they are firing back in self defence against attacks by the Burundian armed forces.
"We are now going to track them down till their last stronghold," said military spokesman Adolphe Manirakiza.