The United States and allies urged people to move away from Kabul airport on Thursday due to the threat of an Islamic State terror attack as Western troops hurry to evacuate as many Afghans as possible before an Aug. 31 deadline.
Pressure to complete the evacuations of thousands of foreigners and Afghans who helped Western countries during the 20-year war against the Taliban has intensified, with all US and allied troops due to leave the airport next week.
In an alert issued on Wednesday evening, the US embassy in Kabul advised citizens to avoid travelling to the airport and said those already at the gates should leave immediately, citing unspecified "security threats".
In a similar advisory, Britain told people in the airport area to "move away to a safe location".
"There is an ongoing and high threat of terrorist attack", the British Foreign Office said in its statement.
Australia also urged its citizens and visa holders to leave the area, warning of a "very high threat of a terrorist attack" at the airport.
The warnings came against a chaotic backdrop in the capital, Kabul, and its airport, where a massive airlift of foreign nationals and their families as well as some Afghans has been underway since the Taliban captured the city on Aug. 15.
While Western troops in the airport worked feverishly to move the evacuation as fast as possible, Taliban fighters guarded the perimeter outside, thronged by thousands of people trying to flee rather than stay in a Taliban-ruled Afghanistan.
Ahmedullah Rafiqzai, an Afghan civil aviation official working at the airport, said people continued to crowd around the gates despite the attack warnings.
"It's very easy for a suicide bomber to attack the corridors filled with people and warnings have been issued repeatedly," he told Reuters.
"But people don't want to move, it's their determination to leave this country that they are not scared to even die, everyone is risking their lives."
A NATO country diplomat in the Afghan capital said that although the Taliban were responsible for security outside the airport, threats from Islamic State could not be ignored.
"Western forces, under no circumstances, want to be in a position to launch an offensive or a defensive attack against anyone in Afghanistan," the diplomat added. "Our mandate is to ensure evacuations end on Aug. 31."
Another Western official said flight operations had slowed on Wednesday but the pace of evacuations would hasten on Thursday.
Taliban guards continue to protect civilians outside the airport, an official of the Islamist group said.
"Our guards are also risking their lives at Kabul airport, they face a threat too from the Islamic State group," said the official, who spoke on condition of anonymity.
The White House said President Joe Biden was briefed on Wednesday about the threat from the ISIS-K militant group as well as contingency plans for the evacuation.
Biden has ordered all troops out of Afghanistan by the end of the month, to comply with an agreement with the Taliban, despite European allies saying they needed more time to get people out.
In the 11 days since the Taliban swept into Kabul, the United States and its allies have mounted one of the biggest air evacuations in history, bringing out more than 88,000 people, including 19,000 in the past 24 hours. The US military says planes are taking off the equivalent of every 39 minutes.
US Secretary of State Antony Blinken said at least 4,500 American citizens and their families had been evacuated from Afghanistan since mid-August, and the State Department was reaching out to about 1,500 who remained there.
Blinken told a news conference in Washington there was no deadline for the effort to help people who want to leave, both Americans and others, and that it would continue for "as long as it takes."
The US military said it would shift its focus to evacuating its own troops in the final two days before the Aug. 31 withdrawal deadline.
The Taliban have said foreign troops must be out by the end of the month. They have encouraged Afghans to stay, while saying those with permission to leave will still be allowed to do so once commercial flights resume after the foreign troops go.
The militant group has asked NATO member Turkey to help keep the airport open after foreign troops leave. Turkey said technical experts might remain to help operate the airport.
The United Nations is leaving some 3,000 Afghan staff at its mission. A U.N. security document reviewed by Reuters described dozens of incidents of threats, the looting of U.N. offices and physical abuse of staff since Aug. 10.
The Taliban's 1996-2001 rule was marked by public executions and the curtailment of basic freedoms. Women were barred from school or work.
The US-backed Afghan government collapsed swiftly after Biden withdrew the troops, two decades after US-back forces had ousted the Taliban in the weeks following the Sept. 11, 2001, attacks on the United States, planned from Afghan territory by al Qaeda.
While the Taliban have said they will respect human rights and not allow terrorists to operate from the country, Taliban spokesman Zabihullah Mujahid told NBC News there was "no proof" that Osama Bin Laden, the late al Qaeda chief, was involved in the 9/11 terror attacks on New York and Washington.
"There is no evidence even after 20 years of war, we have no proof he was involved ... There was no justification for this war," he said.