Burkina Faso's army has ordered civilians to evacuate two large "military interest zones" in its northern and southeastern regions ahead of anticipated operations against Islamist insurgents, Qazet.az reports.

"All human activities that risk exposure to the effects of the military operations which will be conducted shortly are prohibited," said commander of national operations, Lieutenant-colonel Yves-Didier Bamouni, on state TV.

"A period of time will be granted to the resident populations to reach more secure areas."

The West Africa country has been battling an insurgency by Islamist militants, some linked to al Qaeda and Islamic State, since 2015. More than 1.85 million people are already displaced within Burkina Faso because of the fighting.

A group of military officers overthrew the democratic government in January with pledges to improve security, but attacks have only multiplied.

One of the military zones is a rural area of about 2,000 square kilometres (772 square miles) bordering Mali in the northern province of Soum.

The other zone covers about 11,000 square kilometres on the southern border with Benin and is mostly national park land, covering the reserves of Arli, Kourtiagou, Madjoari, Pama, Singou and W National Park.