Islamic State extremists have almost doubled the territory they control in Mali in less than a year, and their al-Qaida-linked rivals are capitalizing on the deadlock and perceived weakness of armed groups that signed a 2015 peace agreement, United Nations experts said in a new report.

The stalled implementation of the peace deal and sustained attacks on communities have offered the IS group and al-Qaida affiliates a chance “to re-enact the 2012 scenario,” they said.