Iraq's divisions hinder battle against IS
Sunni tribal leaders in Iraq's largest province, Anbar, have told the BBC they are being denied arms supplies by the Shia-led Iraqi government for sectarian reasons.
The United States regards the Sunni tribes as crucial to the fight against Islamic State.
But tribal elders say support from the US-led international coalition has been weak and that they do not trust the Americans.
Orla Guerin reports.