Taliban insurgents have seized the presidential palace in Kabul after taking nearly all of the country in just over a week.

A Taliban spokesman and negotiator has told The Associated Press the militant group is holding talks aimed at forming an "open, inclusive Islamic government" in Afghanistan.

US Secretary of State Antony Blinken says the US is evacuating remaining staff at its embassy in Kabul.

The Pentagon has authorised another 1,000 soldiers to help evacuate US citizens and Afghans who worked for them from Kabul.