(Reuters) - Libya closed its air space over Benghazi airport temporarily because of heavy anti-aircraft fire by Islamists aiming at U.S. reconnaissance drones flying over the city, days after the U.S. ambassador and three other Americans were killed in an attack.

The closure of the airport prompted speculation that the United States was deploying special forces in preparation for an attack against the militants who were involved in the attack.

A Libyan official said the spy planes flew over the embassy compound and the city, taking photos and inspecting locations of radical militant groups who are believed to have planned and staged the attack on the U.S. consulate on Tuesday.

Militants used anti-aircraft guns to fire at the drones, forcing the authorities to shut the airport because they feared for the safety of passenger planes.

http://www.reuters.com/article/2012/09/14/us-protests-libya-airport-idUSBRE88D0PJ20120914