The U.S. Treasury on Friday has placed three men, including a Turkish citizen, on its sanctions blacklist, saying they were part of the Islamic State’s global financial network.

Yunus Emre Sakarya of Turkey, Abdulpatta Escalon Abubakar of the Philippines, and Mohamed Mire Ali Yusuf of Somalia provided financial, material or technological support for the extreme jihadist Islamic State (ISIS), AFP quoted the Treasury as saying in a statement.

Sakarya supplied ISIS with materials for drones from his Turkey-based company, Profesyoneller Elektronik, handling $500,000 worth of orders for unmanned aerial vehicles and related equipment in 2016, the Treasury said.

Meanwile, Mire Ali “served as a front for ISIS-aligned groups in the Bari region of Somalia” and Abubakar is alleged to have helped fund the ISIS network in the Philippines and provided weapons and explosives, it said.

Abubakar was arrested by Filipino authorities last September after he flew into Manila from Saudi Arabia, AFP said.