It comes amid reports that 1,000, mainly US, troops could remain on the ground to protect diplomatic missions and Kabul's international airport, reports BBC.

NATO's 20-year military mission in Afghanistan has all but ended, starting a new chapter in the history of the country.

As foreign troops continued to move out of the country, Taliban continued to capture more territories in the country.

Afghanistan has continued to record more violent episodes in recent times.

Taliban spokesman Suhail Shaheen told BBC that seizing Kabul militarily was "not Taliban policy".

But speaking to the BBC from the group's office in Qatar, he said no foreign forces - including military contractors - should remain in the city after the withdrawal was complete.

"If they leave behind their forces against the Doha agreement then in that case it will be the decision of our leadership how we proceed," Shaheen told the BBC.

"We would react and the final decision is with our leadership," he added.