U.S. officials believe extremists are attempting to regroup across northern Iraq after being driven from strongholds in and around Baghdad.
The Islamic State in Iraq, an al-Qaida front group, distributed leaflets a week ago warning residents near the scene of Tuesday's bombings that an attack was imminent because Yazidis are "anti-Islamic."
"My friend and I were thrown high in the air. I still don't know what happened to him," said Khadir Shamu, a 30-year-old Yazidi who was injured in Tal Azir, scene of two blasts.
"This is a terrorist act and the people targeted are poor Yazidis who have nothing to do with the armed conflict," said Dhakil Qassim, mayor in the town of Sinjar near the attacks who blamed al-Qaida in Iraq.
The center of the Yazidi faith is around Mosul, but smaller communities exist in Turkey, Syria and other places.
Baghdad was spared major violence in another sign that a six-month-old security crackdown in the capital is disrupting extremists' firepower. But the brazen daylight raid on the Oil Ministry complex showed that armed gangs can still embarrass authorities.
Dozens of gunmen wearing security force uniforms stormed the compound and abducted a deputy oil minister and four other officials who were spirited away in a convoy of military-style vehicles.
The kidnappings - similar to a commando-like raid on Iraq's Finance Ministry in May - included Abdel-Jabar al-Wagaa, a senior assistant to Oil Minister Hussain al-Shahristani, said Assem Jihad, the oil ministry spokesman.
Al-Wagaa and four other officials with the State Oil Marketing Organization were taken away by more than 50 gunmen in military-style vehicles, said an Interior Minister official, speaking anonymously because he was not authorized to release the information. Five bodyguards were wounded in the raid, the official said.
Both government organizations are near Sadr City, a stronghold of the Mahdi Army militia loyal to radical Shiite cleric Muqtada al-Sadr.
Three suspected militants had been killed and four booby-trapped houses destroyed, he said, citing preliminary reports.
By KIM GAMEL
Associated Press Writer