A bomb exploded at a school in Baghdad's Shiite district of Sadr City, killing five people, including four students, Iraqi officials said.
The bombing took place at about 1 p.m. in an area where large attacks have been infrequent because it is encircled by US and Iraqi security forces and has its own neighborhood security.
The blast also wounded at least 34 people, said an Iraqi police official. A Ministry of Interior official confirmed the casualties.
Both officials spoke on condition of anonymity because they were not authorized to release the information.