and, here we go:
"...In Basra, a group called the "Brigades of Anger" has emerged, vowing to defend Shiites in Iraq from any group deemed a threat. A leader of the group, Dheya al-Mahdi, told The Associated Press that he will give the go-ahead for his followers to avenge the killing of Shiites.
Al-Mahdi blames Wahhabis, an extreme sect of Sunni Islam dominant in Saudi Arabia, for encouraging and funding operations aimed at Shiites in Iraq."
from
Bounties Offered On Americans in Iraq.