If approved, the base could ultimately have as many as 300 United States military and contractor personnel, but it would probably begin with far fewer people than that, military officials said.

Some Africa specialists expressed concern that setting up a drone base in Niger or in a neighboring country, even if only to fly surveillance missions, could alienate local people who may associate the distinctive aircraft with deadly attacks in Pakistan, Somalia and Yemen.

Officials from Niger did not respond to e-mails over the weekend about the plan, but its president, Mahamadou Issoufou, has expressed a willingness to establish what he called in a recent interview “a long-term strategic relationship with the U.S.”

“What’s happening in northern Mali is a big concern for us because what’s happening in northern Mali can also happen to us,” Mr. Issoufou said in an interview at the presidential palace in Niamey, Niger’s capital, on Jan. 10, the day before French troops swept into Mali to blunt the militant advance.

Gen. Carter F. Ham, the head of the Africa Command, who visited Niger this month to discuss expanding the country’s security cooperation with the United States, declined to comment on the proposed drone base, saying in an e-mail that the subject was “too operational for me to confirm or deny.”

Discussions about the drone base come at a time when the French operation in Mali and a militant attack on a remote gas field in the Algerian desert that left at least 37 foreign hostages, including 3 Americans, dead have thrown a spotlight on Al Qaeda’s franchise in the region, Al Qaeda in the Islamic Maghreb, and forced Western governments and their allies in the region to accelerate efforts to combat it.

Senator Dianne Feinstein, a California Democrat who is chairwoman of the Intelligence Committee, said on CBS’s “Face the Nation” on Sunday that in the wake of Osama bin Laden’s death and the turmoil of the Arab Spring, there was “an effort to establish a beachhead for terrorism, a joining together of terrorist organizations.”