'We are not done with you': Biden warns Afghanistan's IS-K militants

US President Joe Biden warned the Islamic State-Khorasan, the group which killed 13 US troops in a suicide bombing at Kabul airport, that they face more retribution from Washington.

"We will maintain the fight against terrorism in Afghanistan and other countries," Biden said Tuesday.

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"And to ISIS-K: We are not done with you yet," he said, using another acronym for the Afghan offshoot of the Islamic State jihadist group.