A series of bombings in Iraq, including twin blasts in a busy street in a Baghdad suburb, killed at least 40 people and wounded dozens on Tuesday, Iraqi officials said.

The deadliest of the day's attacks came shortly before sunset, when a bomb exploded in Baghdad's southeastern suburb of Jisr Diyala. Minutes later, a car bomb went off near the site of the first blast as people started gathering to help the victims of the initial explosion.

The casualty toll in Jisr Diyala rose throughout the evening, and within hours, police and hospital officials said that at least 25 people had been killed and that 50 were wounded, including several students who had just come out of a nearby school after class. The police sealed off the attack area.

No group immediately claimed responsibility for the bombings but Iraq sees near-daily attacks, mostly by Sunni insurgents targeting the country's Shiite majority and security forces. The attacks are often claimed by the Islamic State group, which seized about a third of the country in a blitz last year, along with a swath of territory in neighboring Syria.

Earlier Tuesday, a parked car bomb went off in a commercial area in the town of Mishada, 20 miles north of Baghdad, killing at least four civilians and wounding 12, police officials said.

In Baghdad's northwestern Shula neighborhood, a bomb exploded near a restaurant, killing three civilians and wounded eight, they said. Another bomb also killed three civilians and wounded nine in a commercial area in Youssifiyah, 12 miles south of Baghdad.

Two more civilians were killed and seven others were wounded when a bomb struck an outdoor market in Latifiyah, about 20 miles south of Baghdad. Another bomb hit a police patrol in Madain, about 14 miles southeast of Baghdad, killing a police officer and a civilian and wounding five people.

And in Baghdad's northern Shaab neighborhood, a bomb blast killed one civilian and wounded five.

Medical officials confirmed the casualty figures from al attacks. All officials spoke on condition of anonymity as they were not authorized to release the information.