The Federal Aviation Administration issued unexplained notices late Tuesday closing airspace over El Paso and a large patch of southern New Mexico west of Santa Teresa for 10 days. El Paso International Airport is closed to all flights, the city said.

The orders close off all air travel in the affected area, which could cause massive disruption in the nation’s 23rd largest city.

“THE FEDERAL AVIATION ADMINISTRATION (FAA) CLASSIFIES THE AIRSPACE DEFINED IN THIS NOTAM AS ‘NTL DEFENSE AIRSPACE’. PILOTS WHO DO NOT ADHERE TO THE FOLLOWING PROC MAY BE INTERCEPTED, DETAINED AND INTERVIEWED BY LAW ENFORCEMENT/SECURITY PERSONNEL,” the notices said.

“THE UNITED STATES GOVERNMENT MAY USE DEADLY FORCE AGAINST THE AIRBORNE ACFT, IF IT IS DETERMINED THAT THE ACFT POSES AN IMMINENT SECURITY THREAT,” the notice continued.

The notices, known as Notice to Air Missions, or NOTAM, took effect at 11:30 p.m. Mountain Time Tuesday, and expire at 11:30 p.m. Feb. 20. The announcement caught officials with local government agencies and Fort Bliss by surprise, multiple sources told El Paso Matters.

The El Paso city government issued an advisory early Wednesday that flights at El Paso International Airport are canceled.

“The FAA, on short notice, issued a temporary flight restriction halting all flights to and from El Paso and our neighboring community, Santa Teresa, NM. The restriction prohibits all aircraft operations (including commercial, cargo and general aviation) and is effective from February 10 at 11:30 PM (MST) to February 20 at 11:30PM (MST),” the city said in a news release.

“Airport staff has reached out to the FAA, and we are pending additional guidance. In the meanwhile, commercial airlines operating out of El Paso are being informed of the restriction, which appears to be security related. Travelers are encouraged to contact their airlines to get the latest information on their flight status.”

Closing off airspace over a major U.S. city is a rare action, and officials with the Federal Aviation Administration didn’t immediately respond to questions from El Paso Matters on the reasons for the action.

A person familiar with the notices, who asked not to be identified because they weren’t authorized to speak publicly, said the action to close airspace over a major U.S. for security reasons over extended period hasn’t happened since immediately after the terror attacks of Sept. 11, 2001.

Source: Drudge Report