Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. UN Condemns Haftar Forces for Blocking Flights at Tripoli Airport VOA News The United Nations is sharply criticizing forces of Libyan strongman Khalifa Haftar for blocking flights from landing and taking off from Tripoli's only operational airport. A U.N. statement Wednesday said the organization was "very concerned that preventing flights from traveling in and out of Libya will severely hinder [its work to] provide the much-needed humanitarian assistance to the most vulnerable." Haftar's Libyan National Army declared a no-fly zone over in and around Tripoli in November and extended it last month to includeMitigaInternational Airport. The U.N.-backed government in Tripoli has defied the no-fly zone despite threats from Haftar's forces to shoot down any aircraft that violates it. A spokesman for the U.N.mission in Libya said thatfor the last three weeks, Haftar's army hadnot given it any guarantees that its planes would be able to fly securely. Fighting since 2014 Haftar's eastern-based LNA and the Libyan government in Tripoli have been fighting for power since 2014. The fighting is concentrated in the Tripoli suburbswith neither side making muchprogress, butit has lefthundreds of thousands of civilians trapped in the middle. Leaders fromseveralworld powers agreed at a Berlin summit last month to stop interfering in Libya,to prevent it from becoming what some diplomats call "another Syria." But a January cease-fire has been routinelybrokenand observers say arms continue to flow into the country. .