The situation in Afghanistan's capital, Kabul, escalated sharply Thursday after a suicide attack by militants from the local affiliate of the Islamic State killed over 100 Afghan civilians and 13 US troops at a gate to Hamid Karzai International Airport.

US Central Command head Gen. Kenneth "Frank" McKenzie said American military leadership is in a state of readiness for new attacks in Kabul by the Islamic State Khorasan (IS-K) terrorist group. “We’re prepared to continue the mission,” he told reporters at a briefing Thursday. According to him, the United States has shared limited intelligence with the Taliban — who are guarding the airport — about threat assessments and preparations by IS to commit terrorist attacks. “We believe attacks have been thwarted by [the Taliban],” he added.

These attacks demonstrated that after the United States and its allies ceased their anti-terrorist activities in the country due to the rapid advance of the Taliban and their capture of the capital, the security situation began to deteriorate sharply.

The situation also poses new challenges for Russia and its Central Asian allies such as Tajikistan, Kyrgyzstan and Uzbekistan. While the Americans were present in Afghanistan, they could provide counterterrorism measures that benefitted Afghanistan’s Central Asian neighbors. But after the arrival of the Taliban, a security vacuum may emerge, and the Taliban may face serious difficulties in solving this problem. After the Americans left, Russia hoped that the Taliban would be able to take control of the security situation and destroy terrorist cells in Afghanistan, something Taliban representatives had repeatedly assured the Russians they could do.