"What I would say is that we can confirm that discussions have begun between the United States and Niger for the orderly withdrawal of US forces from the country," Ryder said during a press briefing.
The Defense Department and the US Africa Command will participate in the withdrawal discussions with the Nigerien Government, Ryder added.
The official further said that when it came to Western Africa and the Sahel, the Pentagon would continue to monitor potential threats to ensure the protection of US assets and interests throughout the region.
Last month, a Nigerien military spokesperson said the country's transitional government, which took power in a coup last July, had terminated the military agreement with the United States with immediate effect, citing the interests of the Nigerien people.
On Friday, the New York Times reported that the United States notified Niger it would withdraw some 1,000 military personnel from the country in the coming months.