At least 37 people have been killed and 60 wounded in an attack on a mining company convoy in Burkina Faso.
Five buses carrying staff of Canadian firm Semafo were ambushed on Wednesday about 40 km from the eastern town of Boungou.
A military escort vehicle was reportedly struck by an explosive device before gunmen opened fire.
The attack happened on a road between Fada and its mine in Boungou.
This is the deadliest attack on Semafo staff in 15 months.
Insurgency has killed hundreds of people in recent years in the region. The military has struggled to contain violence that spilled over the border from neighbouring Mali.
Semafo ramped up its security last year after attacks near its two mines in the country.
According to the United Nations some 500,000 people in Burkina Faso have been forced to flee their homes over the past three months.
Last month, 20 people were killed in an attack on a gold-mining site in the north.
Days later, thousands protested in the capital Ouagadougou to denounce violence in their country and the presence of foreign military forces in the region.