There is evidence that jihadi fighters from the Sahel region have arrived in Nigeria through the Benin border.

This is according to a report released by the Dutch think-tank, Clingendael Institute.

The Sahel region is home to terror attacks and extremism particularly in countries such as Mali, Burkina Faso, and Niger Republic.

This has led to the expansion of terrorist groups like Al Qaeda and the Islamic State which carry out attacks on government forces and civilians. This has also weakened the borders of these countries.

Increasing military coups in recent times have also worsened insecurity, with the West African nations severing ties with the US and France, and turning to Russia for help.

Benin, which shares borders with Nigeria, Niger Republic, and Burkina Faso, has also seen an uptick in violent extremism in its northern region.

"That violence has now seeped into Nigeria,” the Clingendael Institute said.

According to the report, banditry is re-emerging in zones controlled by the Jama’a Nusrat ul-Islam wa al-Muslimin, JNIM, a militant jihadist organisation, in Beninn and that the bandits seem to have Nigerian connections.

The report said the extremists have settled in Kainji Lake National Park in Niger and Kebbi states.

“Evidence suggests this involves Sahelian extremists (likely JNIM). Another group would be Darul Salam – a group linked to Boko Haram, if not fully affiliated — with an open attitude towards bandits,” the report said.

“Bandits and unidentified armed groups are known to move towards Kebbi State from Sokoto. It is alleged that these include various Darul Salam fighters with links to the Sahel.”

The Clingendael report said it is unclear what the motive of the Sahel extremists in the park is and what their relationship with other armed groups there will be.