Taliban fighters are seen inside the city of Farah, capital of Farah province southwest of Kabul. AP

The Taliban seized three more provincial capitals in Afghanistan, officials said on Wednesday, putting nine of the nation's 34 in the insurgents' hands amid the US withdrawal from the country as tens of thousands of people fled their homes in the north for the relative safety of the capital and other centres.

An official confirmed on Wednesday that 200 kilometres (125 miles) from Kabul, Taliban fighters took control of another city in northern Afghanistan.

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Taliban noose tightens around northern Afghanistan

Taliban take another Afghan provincial capital

A provincial council member from Badakhshan told the local media reporters that after the Taliban capture of Faizabad — the capital of the northeastern province of Badakhshan — after a long battle, government forces retreated to a neighbouring district, Jawad Mujadidi.

Afghanistan president Ashraf Ghani arrives in Mazar-i-Sharif to check the security situation on Wednesday. Reuters

The far northeastern province of Badakhshan borders Tajikistan, Pakistan and China.

Although Ghani flew to the besieged northern city of Mazar-i-Sharif on Wednesday to rally his beleaguered forces, with Taliban fighters having now taken more than a quarter of the country's provincial capitals in less than a week.

A still image shows what appear to be militants on a pickup truck with a gun in Afghanistan. Reuters

He plans "to check the general security in the northern zone", according to a statement released by the palace.

Afghans receive medical care after being injured in fighting between the Taliban and forces in Mazar-e-Sharif. AP

The loss of Mazar would be a catastrophic blow to the Kabul government and represent the complete collapse of its control over the north -- long a bastion of anti-Taliban militias.

Government officials have appealed for pressure on Pakistan to stop Taliban reinforcements and supplies flowing over the border. Pakistan denies backing the Taliban.

The government has withdrawn from hard-to-defend rural districts to focus on holding population centres. In some places, government forces have given up without a fight.

Internally displaced families from northern provinces take shelter in a public park in Kabul, Afghanistan. Reuters

Six EU member states warned the bloc's executive against halting deportations of rejected Afghan asylum seekers arriving in Europe, fearing a possible replay of a 2015-16 crisis over the arrival of more than a million migrants, mainly from the Middle East.