NAJAF, Iraq, Aug. 31 (UPI) -- Police widened their investigation Sunday into the bombing in Najaf, Iraq, as thousands flocked to the holy city in an outpouring of grief.
Prominent Shiite cleric Ayatollah Mohammad Baqir al-Hakim was one of more than 120 people killed in Friday's bomb attack.
The governor of Najaf said Iraqi police have arrested two men with possible connections to al-Qaida who they suspect are tied to the deadly car bombing, CNN reported.
At least 19 people have been detained, Iraqi police said, but it is not known if any of the detainees have been charged in the bombing.
Coalition authorities in Baghdad said they are willing to cooperate in the investigation but have not yet been asked by Iraqi police for help.
Funerals for many of the victims were held Saturday. More than 500 people were injured in the blast.
The Imam Ali Mosque bombing that killed Hakim has outraged Iraq's Shiites, many of whom said the U.S.-led Coalition Provisional Authority has not done enough to increase security in Iraq.