At least 34 other people were wounded in the attack in the centre of Musayyib, a town that lies about 60 kilometres south of the capital, a police officer and a medic at the local hospital said.
The Islamic State group issued a statement claiming the first attack
The explosion, which targeted a commercial street, comes as Iraqi forces are trying to dislodge Islamic State militants from Falluja
Shortly after the bombs hit, the extremist Islamic State claimed responsibility for two of the explosions.
In a statement circulated online, Islamic State said it was responsible for the blasts: “Our swords will not cease to cut off the heads of the rejectionist polytheists, wherever they are,” it said, using derogatory terms for Shi’ite Muslims.
The official says the bomber detonated his explosives’ vest on Friday at the service in the southwestern Baghdad suburb of Hay al-Amal. At least 43 people were wounded.
Both attacks were carried out by bombers on foot, wearing explosives-laden vests, two police officers said.
The plane-one of several Sukhois used by Iraq in the fight against the Islamic State group-was returning to base when the accident happened.
Abdul-Ghani said there would be no immediate effect on Shiite areas in central and southern Iraq, saying water is being diverted to those areas from the Tigris River.
Medical officials confirmed the death tolls. All officials spoke on condition of anonymity because they were not authorized to talk to journalists.
Tens of thousands of Yazidis fled in August when the Islamic State group captured the northern Iraqi town of Sinjar.
Two policemen were among the dead and at least 26 people were wounded in the attack.
Hours after UN Secretary General arrived for talks with Iraqi officials, pair of car bombings in Baghdad killed 11.
A police officer who provided the death toll said the attack also wounded 42 people.
Police and hospital officials said along with the eight killed, 20 people were wounded at the market.