The US and Iraqi governments have vastly overstated the number of foreign fighters in Iraq, and most of them don't come from Saudi Arabia, according to a new report from the Washington-based Center for Strategic International Studies (CSIS). According to a piece in The Guardian, this means the US and Iraq "feed the myth" that foreign fighters are the backbone of the insurgency. While the foreign fighters may stoke the incurgency flames, they only comprise only about 4 to 10 percent of the estimated 30,000 insurgents.

The CSIS study also disputes media reports that Saudis comprise the largest group of foreign fighters. CSIS says "Algerians are the largest group (20 percent), followed by Syrians (18 percent), Yemenis (17 percent), Sudanese (15 percent), Egyptians (13 percent), Saudis (12 percent) and those from other states (5 percent)." CSIS gathered the information for its study from intelligence services in the Gulf region.

Most of the insurgents are not Saddam Hussien loyalists, but are members of Sunni Arab Iraqi tribes.