Members of the Afghan security personnel and Public Uprising Forces exchange fire with Taliban militants in Shiberghan city, capital of Jawzjan province in northern Afghanistan, July 22, 2021.(Photo: Xinhua)

Taliban insurgents entered the Afghanistan capital Kabul on Sunday, an interior ministry official said, as the US evacuated diplomats from its embassy by helicopter.

The senior official told Reuters the Taliban were coming in "from all sides" but gave no further details.

A tweet from the Afghan Presidential palace account said firing had been heard at a number of points around Kabul but that security forces, in coordination with international partners, had control of the city.

US officials said the diplomats were being ferried to the airport from the embassy in the fortified Wazir Akbar Khan district. More American troops were being sent to help in the evacuations after the Taliban's lightning advances brought the Islamist group to Kabul in a matter of days.

Just last week, a US intelligence estimate said Kabul could hold out for at least three months.

"Core" US team members were working from the Kabul airport, a US official said, while a NATO official said several EU staff had moved to a safer, undisclosed location in the capital.

A Taliban official told Reuters that the group did not want any casualties as it took charge but had not declared a cease-fire.

There was no immediate word on the situation from President Ashraf Ghani, who said on Saturday he was in urgent consultations with local leaders and international partners on the situation.

Earlier on Sunday, the insurgents captured the eastern city of Jalalabad without a fight, giving them control of one of the main highways into landlocked Afghanistan.

They also took over the nearby Torkham border post with Pakistan, leaving Kabul airport the only way out of Afghanistan that is still in government hands.

The capture of Jalalabad followed the Taliban's seizure of the northern city of Mazar-i-Sharif late on Saturday, also with little fighting.

After US-led forces withdrew the bulk of the their remaining troops in July, the Taliban campaign accelerated as the Afghan military's defenses appeared to collapse.

US President Joe Biden on Saturday authorized the deployment of 5,000 US troops to help evacuate citizens and ensure an "orderly and safe" drawdown of military personnel.

Reuters