Afghanistan Civil Aviation Authority (ACAA) said on Sunday the Bagram Airport Radar and Telecommunication System (VSAT) has been reactivated following the withdrawal of foreign troops from the key military facility.

The last of the US troops based at Bagram withdrew in the early hours of Saturday morning after handing over the sprawling facility to the Afghan National Defense and Security Forces.

The radar and communication systems (VSAT) at Bagram Airport, which was deactivated before the decisive support forces left the airport, has been reactivated by the technical team of the Civil Aviation Authority, the ACAA said in a statement on Facebook.

These two systems are used to guide the planes that land and take off at this airport and at Hamid Karzai International Airport (in Kabul), as well as transit flights, added the ACAA.

Bagram base was the largest of all foreign military bases in the country and lies about 40km outside Kabul.

Secured by foreign troops soon after their invasion in 2001, Bagram has been a key base in the war over the past 20 years. Three former US presidents have landed at the facility over the years along with hundreds of other key American and NATO officials.