The Maute group are Filipino Muslims who pledged alliance to the ISIS...they caused the siege last tuesday. It is still ongoing but under control by the Military.
The issue now is on who ordered them to do it..focus is on one of the Aquino's who is a Senator, he was there in Marawi City a few days before meeting an undisclosed group. Ninoy Aquino was his grandfather who was a known founder of CPP-NPA during Marcos regime.