The Iraqi Interior Ministry has put the death toll from Tuesday's bombings in northern Iraq at 400, with the toll expected to rise further.
The four truck bombings, which targeted the Yazidi religious sect in Kahtaniya, are now the worst attack since the US-led invasion of Iraq in 2003.
Two days after the bombings, the rescue operation is continuing as teams of army, police and civilians search the wreckage of the villages of al-Qataniyah and al-Adnaniyah.
At least 30 Yazidi clay houses were destroyed by the blasts and bodies are still being pulled from the debris.
Members of the 500,000 strong Yazidi sect are often persecuted due to the nature of their ancient religion, which venerates the chief angel often identified as Satan in both Islam and Christianity.
Angry Yazidi have appealed to the Iraqi government for help, complaining that no water or supplies have yet reached the scene of the bombings.
The US military insisted that an airlift of food, medicines and blankets would soon take place.
Earlier, 17 people were killed and nine injured in a car bomb attack in central Baghdad.
The bomb went off in a busy commercial area near al-Rusafi Square in the heart of Baghdad.
Witnesses reported seeing flames pouring from the building as emergency agencies fought the blaze.
