Human Rights Watch is reporting Malian armed forces summarily executed 300 detained men last week in what the group describes as the worst single atrocity reported in Mali’s decade-long armed conflict targeting Islamist groups. Human Rights Watch reports at least 100 Russian troops or mercenaries took part in the operation. Human Rights Watch’s West Africa Director Corinne Dufka said, “Abuses by armed Islamist groups is no justification at all for the military’s deliberate slaughter of people in custody.”