A roadside bomb exploded on a main Baghdad road early today, wounding three civilians, the Interior Ministry said.
At least six other blasts were later heard in the capital.
The roadside bomb on Karrada street also damaged several vehicles and shattered windows, witnesses said. The target of the attack was not immediately clear.
Ambulances rushed to scene of the explosions and American troops cordoned off the area.
Interior Ministry spokesman Colonel Adnan Abdul-Rahman said three civilians were wounded. The ministry had no immediate information on the other explosions that rocked the city.