With thousands of desperate Afghans and foreigners crowding into Kabul airport in the hope of fleeing Afghanistan's new Taliban rulers, pressure grew on US President Joe Biden on Monday to extend the deadline for the evacuation operation.
Biden on Sunday warned that the evacuation was going to be "hard and painful" and said a lot could still go wrong. US troops might stay beyond their Aug. 31 deadline to oversee the evacuation, he said.
That concern was underlined on Monday morning when a firefight erupted at the airport between Afghan guards and unidentified gunmen. German and US forces were also involved, the Germany military said.
The security situation around Kabul airport has become increasingly dangerous, a senior Canadian government official told reporters.
"Crowds are intense, violence is becoming more common and Taliban checkpoints in surrounding areas are preventing many from reaching the airport area," said the official, who spoke on the condition he not be identified.
Canadian special forces are operating outside the airport in an effort to bring as many eligible people as possible through security gates, the official added.
Britain and France were among those calling for the deadline to be eased. But a Taliban official said foreign forces had not sought an extension and it would not be granted if they had.
And a local Taliban militant, speaking to a large crowd in Kabul, urged Afghans to remain in the country.
"Where has our honor gone to? Where has our dignity gone to?" the unidentified militant said. "We will not let the Americans continue to be here. They will have to leave this place. Whether it is a gun or a pen, we will fight to our last breath."
The Taliban seized power just over a week ago as the United States and its allies were withdrawing troops after a 20-year war launched in the weeks after the Sept. 11 attacks on the United States by al Qaeda in 2001.
Panicked Afghans and foreigners have thronged the airport for days, clamoring to catch a flight out. Many fear reprisals and a return to a harsh version of Islamic law that the Taliban enforced while in power from 1996 to 2001.
Twenty people have been killed in the chaos, most in shootings and stampedes, as US and international forces try to bring order. One member of the Afghan forces was killed and several wounded in Monday's clash, the US military said.
A flight carrying evacuated at-risk Afghans will arrive in the United States later on Monday from Ramstein air base in Germany, a senior State Department official said, adding that the pace of flights from transit hubs housing evacuees will ramp up.
The official dismissed reports that only Americans could get through to Kabul airport while others were blocked.
Germany said it had airlifted almost 3,000 people originating from 43 countries from Kabul, including 1,800 Afghans.
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Biden said the security situation was changing rapidly and remained dangerous.
"Let me be clear, the evacuation of thousands from Kabul is going to be hard and painful," Biden said on Sunday.
British Prime Minister Boris Johnson will urge Biden to extend the deadline. His spokesperson said Britain still wanted to fly out thousands of people, but British evacuations could not continue once US troops leave.
France's foreign minister said more time was needed. "We are concerned about the Aug. 31 deadline set by the United States," Jean-Yves Le Drian said.
German Foreign Minister Heiko Maas said a virtual summit of the Group of Seven wealthy nations on Tuesday needed to agree on whether to extend the deadline and how to improve access to the airport.
The airport chaos is also disrupting aid shipments.
Some 500 tonnes of medical supplies were stuck because Kabul airport was closed to commercial flights, Richard Brennan, World Health Organization regional emergency director for the Eastern Mediterranean Region, told Reuters.
He said empty planes should divert to Dubai to collect the supplies on their way to pick up evacuees in Afghanistan.
Leaders of the Taliban, who have sought to show a more moderate face since capturing Kabul, have begun talks on forming a government, while their forces focus on the last pockets of opposition.
Taliban fighters had retaken three districts in the northern province of Baghlan which opposition forces briefly captured and had surrounded opposition forces in the Panjshir valley, an old stronghold of Taliban opponents northeast of Kabul.
"The enemy is under siege in Panjshir," Taliban spokesman Zabihullah Mujahid said.
Anti-Taliban leader Ahmad Massoud said on Sunday he hoped to hold talks with the Taliban but his forces in Panjshir - remnants of army units, special forces and militiamen - were ready to fight.
Zabihullah also said the Taliban wanted to "solve the problem through talks."
British Prime Minister Boris Johnson and US President Joe Biden agreed on Tuesday to work together to ensure all those eligible to leave Afghanistan were able to, including after the initial evacuation phase ended, Johnson's office said.
"They discussed the ongoing efforts by the UK and US to coordinate the rapid and safe evacuation of our nationals and those who previously worked with our governments from Kabul International Airport," a Downing Street spokesman said after the two leaders spoke by phone.
"The leaders agreed to continue working together to ensure those who are eligible to leave are able to, including after the initial phase of the evacuation has ended.