BUJUMBURA (AFP) - More than 300 members of Burundi's former rebel group, the National Liberation Forces (FNL), and opposition supporters have been killed in the past five months, a rights group said Tuesday.

"A devilish killing machine is targeting opposition activists, and for over five months now, more than 300 demobilised FNL fighters have been killed," said Onesphore Nduwayo, the head of Government Action Observatory.