The Libyan National Army (LNA) announced it is imposing a ``no-fly zone'' over the capital Tripoli.
The LNA's announcement comes after two unmanned drone aircraft one American and one Italian were lost near the capital last week.
The LNA has said it shot down the Italian drone, while the U.S. military hasn't given a reason for its drone's loss.
Ahmed al-Mismari, an LNA spokesman, said late Saturday that all flights over Tripoli and nearby towns are ``prohibited without prior coordination.''
Libya is split between rival governments.The LNA is allied with the government based in the country's east, while a UN-supported administration holds the capital,Tripoli in the west.
The LNA has been trying to capture Tripoli since April.