A car bomb (search) exploded on a crowded street in the Iraqi capital on Wednesday, killing four people and injuring dozens, police said.

The blast took place in Baghdad's Azimiyah (search) neighborhood, a Sunni Muslim (search) district where support for Saddam Hussein's regime had been strong.

A car bomb Tuesday in the center of Baghdad killed three people and injured about 20 near the headquarters of the pro-American Patriotic Union of Kurdistan.