Chaos at Kabul airport as Afghans try to flee; US troops fire shots to disperse crowd (VIDEO)

US troops securing the Kabul airport reportedly fired shots in the air Monday as chaotic scenes unfolded with Afghans scrambling onto the tarmac in the hopes of catching a flight out of the country after the Taliban took charge over night.

On Sunday, hours after President Ashraf Ghani fled Afghanistan, Taliban fighters entered the presidential palace according to footage shot by Al Jazeera. The flag on the US embassy was lowered as US diplomats were ferried to the airport by helicopter, including the acting ambassador.

Many cities and districts in Afghanistan fell with little fanfare in recent days as the Afghan security forces largely crumbled in the face of the insurgency. By Sunday, the Taliban were able to enter Kabul with little to no resistance.

The Taliban's rapid advances have effectively coincided with the withdrawal of NATO troops from the country, almost 20 years after the US-led invasion to topple the Taliban in the aftermath of the September 11 terror attacks.