Burundian troops killed 18 gunmen in fierce clashes, a government official said on Tuesday 22 November, stoking fears that a new rebellion may erupt in the central African nation. The coffee-producing country has enjoyed relative peace since the Hutu rebel group, Forces for National Liberation, laid down its weapons and joined the government in 2009 after almost two decades of war. But attacks on civilians and soldiers have intensified since elections last year were widely boycotted by the opposition.