From Fox News:

In the holy city of Karbala, at least one attacker blew himself up and pre-set explosives went off, killing 85 and wounding more than 230.

A fourth would-be bomber whose explosives did not detonate was captured at Kadhimiya, and six people were arrested in connection to the attack in Karbala, Kimmitt said.

Al Qaeda-linked Jordanian militant Abu Musab al-Zarqawi is a "prime suspect" in the attacks, Kimmitt said. U.S. officials say al-Zarqawi was planning spectacular attacks on Shiites aimed at sparking a Sunni-Shiite civil war.

In Iran, which lost at least 22 people in the attacks, the vice president for legal and parliamentary affairs, Mohammad Ali Abtahi, also blamed Al Qaeda.

Iraqi police also arrested four would-be bombers in the southern Iraqi city of Basra on Tuesday. Two men — a Syrian and an Iraqi — were arrested after a car bomb was found outside the Seyed Ali al-Musawi Mosque.

Later in the day, police arrested two women who were wearing explosives-laden belts as they marched in a procession to mark the mourning festival Ashoura.

A bomb was also defused Monday night in the holiest Shiite city, Najaf, officials said.