Another blast in Baghdad kills dozens
Rescue workers say the death toll could rise as bodies are still being pulled from the debris.
Gunfire erupted immediately after the blast, which damaged the outer walls of the mosque.
The explosion came just 48 hours after a curfew was lifted following last week's bombing of another Shiite Mosque in Samarra.
And the latest developement, several mortar bombs have landed in Baghdad's heavily fortified Green Zone – home of the U.S. embassy and Iraqi government buildings. It's unclear if anyone was hurt in the attack.