The United States on Saturday carried out drone strikes against an Islamic State "planner" in Afghanistan, news agency AFP reported, quoting the Pentagon. The unmanned airstrike occurred in the Nangahar province of Afghanistan, and the target was a planner of the Islamic State-Khorasan, the group which claimed credit for the deadly suicide bombing at Kabul airport. At the same time, the United States also called for all of its citizens to leave Kabul airport gates immediately. Amid a rush for evacuations from Afghanistan, a series of bombings on Thursday, near the Kabul airport, killed at least 95 Afghans and 13 US troops. This was the deadliest day for American forces in Afghanistan since August 2011. The toll is expected to rise further.  In a speech on Thursday, US President Joe Biden blamed the Islamic State group's Afghanistan affiliate. "We will rescue the Americans; we will get our Afghan allies out, and our mission will go on," Biden said. He cited the threat of more terrorist attacks as a reason to keep to his plan to end all evacuations by August 31.The Taliban have wrested back control of Afghanistan two decades after they were ousted in a US-led invasion following the 9/11 attacks, which were orchestrated by al-Qaida extremists being harboured in the country. Their return to power has terrified many Afghans, who fear they will reimpose the kind of repressive rule they did when they were last in control. Thousands have rushed to flee the country ahead of the American withdrawal as a result.The US said more than 1,00,000 people have been safely evacuated from Kabul, but thousands more are struggling to leave in one of history's largest airlifts. The White House said Friday morning that 8,500 evacuees were flown out aboard U.S. military aircraft in the previous 24 hours, along with about 4,000 people on coalition flights.