The US-led coalition conducting airstrikes against ISIS in Iraq spends $10 million on its campaign every week, coalition spokesman Col. Steven Warren said Wednesday. Warren told a press conference in Baghdad that all airstrikes were coordinated with the Iraqi government, the Alsumaria television channel reported. Warren's words came after an Iraqi opposition leader, Sheikh Akram Kaabi, stated that his country's government was paying the coalition for sorties, most of which were not real. ISIS is an extremist group that has occupied large areas in Iraq and Syria and has proclaimed a caliphate in territories under its control. The US-led international coalition has been conducting airstrikes against ISIS positions in Iraq and Syria without approval of the UN Security Council or Damascus' request since 2014.