A series of bombings in Baghdad left 24 dead and dozens wounded Thursday, intensifying fears of an increase in sectarian violence in the midst of a political crisis.

A triple bombing in Baghdad’s Sadr City area Thursday morning killed at least nine people and wounded 35 others, an official with Iraq’s Interior Ministry said.

The first bomb — attached to a motorcycle — detonated near a group of laborers who were searching for day jobs in the Shiite neighborhood, according to the official. Shortly after that, two other bombs detonated in quick succession nearby.