Celebratory gunfire echoed across Kabul as Taliban fighters took control of the airport before dawn on Tuesday following the withdrawal of the last US soldier in Afghanistan, ending 20 years of war.

"In this way, our country became completely free and independent," Taliban spokesman Zabihullah Mujahid wrote on Twitter.

Shortly after the spokesperson's comments on social media, roughly at 1am local time, Taliban members started celebratory gunfire which lasted for about an hour.

Read: War in Afghanistan over as last US troops leave

Following the gunfire, Mujahid said in a separate tweet that "the gunshots heard in Kabul are as a result of celebratory firing, the Kabul residents should not worry, we are trying to control it."