At least 40 civilians were killed in a jihadist attack in the northern Burkina Faso town of Djibo at the weekend, the UN Human Rights Office said Tuesday.

The drone was reportedly targeting armed groups in the area, but hit a village where residents were celebrating a Muslim festival. The incident has sparked outrage and calls for accountability from human rights groups and security analysts.

Nigeria's army on Thursday faced growing condemnation and calls for a thorough investigation from civil society groups over a drone strike that killed at least 85 civilians by mistake.