Access to several ministries in the same area of the capital, Niamey, was also been blocked.

No shots were fired and at this stage it is not clear if this was an attempt by the troops from the presidential guard to seize power.

Some sources say President Mohamed Bazoum has been in discussion with the soldiers.

Niger is home to two jihadist rebellions.

It is a key ally for several Western countries including France and the US - in the fight against Islamist militancy in West Africa.