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West African neighbours Niger, Burkina Faso and Mali are facing an insurgency from different jihadist groups which operate across the Sahel region.

There has been a resurgence in jihadist attacks on military bases in the Sahel state in recent weeks.

The increased assaults in the Sahel region have raised concerns about the efficacy of Wagner in the region.

The attacks, the latest sign of collapsing security in Mali and the wider Sahel region, came after the United States Africa Command warned about growing efforts by various different Islamist militant groups which operate in the Sahel to gain access to West Africa's coastline.

The consequences of warming will probably vary widely across the world, the report found: rapid thawing of Arctic sea ice, drier seasons in the Amazon, excess rain in places such as Alaska, northern Europe and the Sahel in north-central Africa.