0325 GMT July 17, 2018
The Facebook page of Mitiga Airport, in eastern Tripoli, said “flights have been suspended because of fighting that broke out this morning,” middleeasteye.net wrote.
Al-Radaa, a force loyal to the UN-backed Libyan government and tasked with keeping the facility secure, said in a statement it had come under attack.
An armed group “has attacked Mitiga International Airport... which is home to a prison where more than 2,500 people are held for various reasons,” Al-Radaa said on Facebook.
Fighters attacked in a bid "to free" some of its members being held there, it added, without identifying the attackers or saying if there were casualties or damage.
A Libyan pilot said the airport, the scene of frequent clashes between rival militias, had been evacuated.
“All the staff and passengers who were at the airport were evacuated,” the pilot said, speaking on condition of anonymity.
“We saw tanks in the airport’s perimeter,” he added.
Mitiga, a former airbase, has been a civilian airport since Tripoli's main international airport was badly damaged in fighting between rival militias in mid-2014.
Libya has been wracked by chaos since the 2011 uprising that toppled and killed longtime dictator Muammar Qaddafi, with rival authorities and militias battling for control of the oil-rich country.
The North African country has rival administrations, with the authorities in the east not recognizing the UN-backed Government of National Accord (GNA) based in the capital. Al-Radaa is loyal to the GNA and also serves as a police force in Tripoli.