Independent arms-trafficking researchers worked for six years to pin down the source of rifle and machine-gun ammunition in regions of protracted conflict.

President François Hollande of France reportedly said he was ready to respond to an appeal for help, a day after Islamists advanced into territory long held by the Mali government, according to an army officer.

Thursday’s violence claimed 10 lives and authorities say there is deep-rooted hatred between the Pokomo and Orma ethnic groups, which have been fighting for years.

The growing incidence and intensity of extreme weather events is a sign that climate change is not just about rising temperatures.

Islamists advanced into territory long held by the Mali government, dealing a significant blow to the army’s efforts to contain the militants, according to an army officer.