On Wednesday, members of the Nigerien presidential guard blocked President Mohamed Bazoum inside the presidential palace, closed borders and imposed a nationwide curfew.
"From Nigeria," the official said on the sidelines of the second Russia-Africa summit, commenting on which intermediaries are in Niger.
The official added that he spoke with Bazoum earlier in the day and that the Nigerien president was in good health.
On Wednesday, Niger's presidential guard's members began a mutiny by surrounding the presidential palace in the country's capital Niamey and blocking off the president's office and residence.