According to security officials, the explosion took place on Monday in eastern Baghdad, when an attacker detonated his explosives as worshippers were leaving a Shia mosque after noon prayers.
At least 26 other people were injured in the bomb attack.
There has been no claim of responsibility for the attack yet.
Earlier on Saturday, three car bombs killed 21 people and wounded 118 others in the northern city of Kirkuk, situated 236 kilometers (147 miles) north of the capital.
On the same day, a bomber blew up his explosives-laden car outside an intelligence headquarters in Baghdad, killing at least 11 people, while nine lost their lives in another explosion in the city of Tikrit, located 140 kilometers (86 miles) northwest of Baghdad.
The Monday bomb attack came as Iraq has faced brutal violence by Takfiri ISIL militants across the country’s north and west since early June. The crisis has deteriorated in recent weeks, as the militants have swept over new towns in the north, forcing members of the minorities out of their homes.
The ISIL terrorists have threatened all communities, including Shias, Sunnis, Kurds, Christians, Izadi Kurds and others, as they continue their advances in Iraq.
They have been committing heinous crimes in the areas they have taken, including the mass execution of civilians as well as Iraqi army troops and officers.
The Iraqi army, backed by thousands of volunteers, is engaged in fierce fighting with the ISIL militants to push them out of the captured areas.
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