Bomb explosions near mosques in holy city of Baghdad leave at last three people dead . In Baghdad 's Sadr City , roadside bomb kills three people Thursday morning . Bomb attacks near other religious shrines in Iraq have happened several times . Fierce clashes occurred near the shrines in August 2007 between Shiite rivals .
Two bombs near shrines in holy city of Karbala leave at last three people dead . In Baghdad 's Sadr City , roadside bomb killed three people Thursday morning . Bomb attacks near other religious shrines in Iraq have happened several times . Fierce fighting occurred near the shrines in August 2007 between Shiite rivals .