Burundian forces were chasing rebels Friday after the rebels launched an attack on the capital Bujumbura Thursday night, reports said, according to dpa. Troops were pursuing PALIPEHUTU-FNL guerrillas in the rolling green hills overlooking Bujumbura after the attack Thursday night, which saw heavy shelling and gunfire sound off around the capital, killing at least four soldiers. The FNL are the only rebel group who have not signed onto a peace treaty with other rogue groups, but it penned a ceasefire deal in 2006 that has been broken often. "They are not committed to peace. Every time we make a step ahead toward a lasting peace, they make one step backwards," a government spokeswoman told the BBC. Burundi is emerging from the 1993 civil war between the ethnic Hutu majority and the minority Tutsis. The war, which claimed the lives of some 300,000 people, was sparked when Hutu rebels launched an offensive against the Tutsi-dominated government and army.