Warning ISIS-K, US President Joe Biden on Saturday vowed to keep up airstrikes against the Islamic extremist group whose suicide bombing at the Kabul airport killed scores of Afghans and 13 American service members.

Meanwhile, he outlined the threat of another “highly likely” terror attack this weekend as the US winds down its evacuation.

The United States carried out a drone mission in eastern Afghanistan early on Saturday that the Pentagon said killed two members of the Islamic State group’s Afghanistan affiliate. 

Following the US attack, Biden said in a statement, “This strike was not the last.”

“We will continue to hunt down any person involved in that heinous attack and make them pay.” He paid tribute to the “bravery and selflessness” of the American troops executing the hurried airlift of tens of thousands from Kabul airport, including the 13 US service members who were killed in Thursday’s suicide bombing at an airport gate.

Meanwhile, the Pentagon said the remaining contingent of U.S. forces at the airport, now numbering fewer than 4,000, had begun their final withdrawal ahead of Biden’s deadline for ending the evacuation on Tuesday.

The evacuation proceeded as tensions rose over the prospect of another ISIS-K attack.

Talking about the threat of another possible terror attack, Biden said, “Our commanders informed me that an attack is highly likely in the next 24-36 hours,” adding that he has instructed them to take all possible measures to protect their troops, who are securing the airport and helping bring onto the airfield Americans and others desperate to escape Taliban rule.

Also read: Kabul blasts: US President Joe Biden in tears vows to take revenge | Watch

Meanwhile, the remains of the 13 American troops were on their way to the United States, the Pentagon said.

Their journey marked a tragic turning point in a nearly 20-year American war that has cost more than 2,400 US military deaths and is coming to an end with the re-emergence of a Taliban organisation that was deposed by US forces in October 2001.