In the first attack, police officials say a motorbike bomb went off near a gathering of day laborers in the Sadr city neighborhood Thursday morning, killing six people and wounding 10 others.

Half an hour later, a roadside bomb exploded near a small tea shop in the same neighborhood, wounding six people.

Medical officials at nearby hospitals confirmed the casualties. The officials spoke on condition of anonymity because they were not authorized to release the information.

Iraqi officials have warned of a resurgence of Sunni and Shiite militants and an increase in violence following the U.S. troops withdrawal, which was completed last month.