An article for the SUN online on ISIS sleeper cells still operating in Syria, even after the fall of their de facto capital, Raqqa to the US back coalition forces:

https://www.thesun.co.uk/news/6906151/isis-death-cult-is-still-plaguing-syrian-cities-at-night-with-sleeper-cells-hiding-in-the-day-only-to-launch-attacks-in-the-dark/