Russian military personnel have entered an air base in Niger that is hosting U.S. troops, a senior U.S. defense official told Reuters, a move that follows a decision by Niger's junta to expel U.S. forces.

Before a coup in Niger in July 2023 led to the demand that American troops leave the country, the U.S. used two Niger airbases to fly drones on counterterrorism missions in the Sahel region of Africa.

Russian and US troops have been operating out of the same military base in Niger for at least several weeks, a US defense official and another source familiar with the matter told CNN, putting the two militaries in close proximity to each other at a time of heightened tensions over the war in Ukraine and as the country’s ruling junta has made clear it wants US forces to leave.