Five people have died in overnight shelling of the Burundian capital. The only Hutu rebel group not to enter peace talks, the Forces for National Liberation, are blamed for the attacks in the north and east of Bujumbura.
The shelling follow the deaths of four civilians whilst the army was hunting for FNL rebels north of the capital.
Last week the FNL criticised a deal between the government and the main Hutu rebel group aimed at ending the country's 10-year civil war.
"A number of shells fell on Bujumbura and we have already counted one death in Kiriri, four others in the Kamenge quarter and one injury in the Gihosha area," army spokesman Augustin Nzabampema told AFP news agency.
The Forces for the Defence of Democracy, has said it will join a power-sharing government within two weeks.
At least 300,000 people have been killed in Burundi's civil war in which the Hutu majority have fought to wrest power from the minority Tutsis who traditionally have ruled the country.
Deaths
In the weekend incident, Witnesses say four bodies were found in the village of Kwigere after government troops rounded up a group of young people for questioning.
An army officer is reported to have dismissed allegations that army soldiers were responsible.
"Soldiers came to the village of Kwigere early this morning and took a group of men with them and we later found four bodies and seven people injured," a witness told AFP news agency.
"We don't know what happened exactly, but the residents accuse the military of systematically killing civilians," said Daniel Ndirahisha, administrator for the town of Isale, which includes Kwigere.
Troops reportedly opened fire when several of those detained tried to escape.
