'Rising insecurity is of grave concern,' UNAMA tweeted after a suicide bomber killed at least 5 civilians and injured 40 others.
Left without a sanctuary or charismatic leader, ISIS has lost much of its credibility and power, and is scrambling to remain relevant, analysts say.
Washington is concerned that terrorist groups could be using Afghanistan as a haven for training and operations.
Tehreek–e-Taliban Pakistan (TTP) has been responsible for dozens of violent attacks and thousands of deaths across Pakistan since emerging in 2007.
If not stopped, ISIS will continue to expand its activities in Afghanistan and spread to other countries in the region, local residents and analysts warn.
The Friday morning blast ripped through Kaaj Higher Educational Centre in Dasht-e-Barchi neighbourhood, as students prepared for exams.
The Russian embassy was one of the few to remain open after August 2021, when most nations shut down embassies and evacuated staff.
The expanded presence of Lebanese Hizbullah and the Fatemiyoun militia in Syria poses questions about Iran's motives for equipping and training its affiliated militias.
ISIS has claimed responsibility for two blasts in western Kabul that killed at least 10 people and injured at least 40 others. Casualty figures are not yet available for a third blast in the city.
Leadership of al-Qaeda's global franchise is the lingering question after the group's leader, Ayman al-Zawahiri, was killed in a US strike in Kabul.