BAGHDAD, Iraq (CNN) -- Bombings killed six Iraqis and wounded 51 in Baghdad and Mosul on Tuesday, and the Iraqi Interior Ministry said the death toll in a suicide bombing the day before in Karbala rose to 50.
Iraqis care for their son at a hospital in Karbala on Tuesday. He was wounded in Monday's bombing.
A car bomb exploded outside an electronics store in Mosul, killing three Iraqis and wounding 40, the U.S. military said.
The fire was contained, but the four-story building was destroyed, the military said.
"The people who committed this act do not have a conscience," said Maj. Dan Meyers, spokesman for Multi-National Division-North. "Local authorities and [Iraqi Security Forces] are working together and currently have the situation under control."
In Baghdad, a roadside bomb blast killed three people, including two traffic police officers, and wounded seven others along a road in the mixed Sunni-Shiite Binook neighborhood late Tuesday morning, a ministry official said. 
Watch U.S. troops working to stop Mosul bombings »
Four Iraqis were wounded by a roadside bomb on Commercial Street in Baghdad's Shabb Shiite neighborhood, also late in the morning, the official added.
The Karbala attack, in which a female suicide bomber apparently targeted Shiite worshippers on a busy street just before evening prayer services Monday, killed 50 and hurt 74 others, the official said. Watch aftermath of Karbala attack »
Karbala is a Shiite holy city, southwest of the capital city of Baghdad. It's the site of the Imam Hussein shrine, one of Shiite Islam's holiest locations. The shrine marks the burial spot of Hussein bin Ali, the grandson of the Prophet Muhammad, who was killed in battle nearby in 680.
Meanwhile, CNN has learned that President Bush will hold a special meeting with the Joint Chiefs of Staff next week to receive recommendations about the next steps in the war in Iraq and possible additional troop reductions, CNN has learned.
The March 26 meeting at the Pentagon will be the first step in a series of critical briefings and congressional hearings over the next few weeks about Iraq.
The congressional hearings could pit top U.S. commanders against many Democrats on Capitol Hill, including Democratic presidential candidates Sens. Hillary Clinton and Barack Obama, who have called for mandated timetables for withdrawal from Iraq. E-mail to a friend 
CNN's Mohammed Tawfeeq and Jomana Karadsheh contributed to this report.
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