BAGHDAD, Iraq (CNN)  -- Iraqis celebrated in the streets Tuesday for the withdrawal of U.S. troops from their cities and towns under an agreement signed last year with the U.S. government. A crowd gathers Tuesday after a deadly bombing in the northern Iraqi city of Kirkuk. But celebration was tempered by fears of renewed violence as insurgents launched new attacks. At least 30 people, including women and children, were killed in what security sources called a "huge bombing" Tuesday in the northern Iraqi city of Kirkuk. Dozens were wounded in the attack in a busy shopping area in a predominantly Kurdish part of the disputed oil-rich city.
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NEW: Obama: "Iraqis are rightly treating this day as a cause for celebration"
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Hundreds of Iraqis dance and sing in Baghdad park to mark U.S. pullout
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Bombing kills at least 30 in northern Iraqi city of Kirkuk, police official says
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Iraqi woman: "Now that the Americans are leaving, we will be more afraid"
While many Iraqis publicly said they are glad to see @placeholder out of their neighborhoods, some were worried about what the future may hold without the U.S. military nearby.
Four U.S. soldiers serving in Baghdad died Monday of combat-related injuries, the latest of more than 4,300 @placeholder to die there since the U.S-led invasion in 2003.