13 French soldiers killed in helicopter collision

Thirteen French soldiers were killed in Mali when two helicopters collided during an operation against insurgents in the country’s restive north, officials said on Tuesday, the heaviest single loss for the French military in nearly four decades.

The accident occurred late Monday when three helicopters and a squadron of Mirage jets arrived to support ground troops pursuing the fighters in the Liptako region, near the borders of Burkina Faso and Niger, the defence ministry said.

The accident brought to 41 the number of French troops killed in the Sahel region since Paris intervened against al-Qaeda-affiliated jihadists in Mali in 2013. It also again underscored the challenge for France of trying to control an insurgency in an area the size of Western Europe.

Defence Ministry Florence Parly said on Monday’s operation was particularly risky because it took place in "total darkness" on a moonless night, but the exact cause of the collision remains unknown.

Shortly after troops engaged the insurgents fleeing on motorbikes and in a pick-up truck, a Tiger attack helicopter collided with a Cougar military transport helicopter. Both aircraft crashed not far from each other, killing all on board, the ministry said.

Mali has been besieged by militants carrying out deadly strikes against army bases and other targets in recent weeks, a flare-up of violence despite years of efforts to stem the attacks. Addressing journalists in Paris, Parly said President Emmanuel Macron would lead a commemorative service for the soldiers at the Invalides military hospital and museum in Paris "in the coming days." General Francois Lecointre, speaking alongside Parly, said the "black box" flight data recorders had been recovered from both aircraft.

He did not identify the insurgents, but said the Islamic State in the Greater Sahara (ISGS) -- an affiliate of the Middle East terror group - was the main insurgent force in the area. One of the victims Monday was the son of French Senator Jean-Marie Bockel, a centrist former government minister who sits on the senate’s armed forces committee, the father confirmed to AFP.

"These 13 heroes had just one goal: To protect us. I bow my head in front of the pain of their families and comrades," President Emmanuel Macron said on Twitter. Mali’s President Ibrahim Boubacar Keita said the soldiers had died for Mali and all Sahel countries, as well as for France.