Iraqi police and rescue crews are searching through the rubble of a mosque and nearby homes for bodies and possible survivors of a suicide bombing that killed at least 72 people.
The bombing Saturday near a Shi'ite mosque in northern Iraq wounded some 200 people.
The attack near the city of Kirkuk came just 10 days before U.S. forces are scheduled to pull out of Iraq's urban areas.
The suicide bomber set off explosives in a truck as worshippers left a mosque following midday prayers in Taza, a mainly Turkmen town south of Kirkuk. Dozens of homes were destroyed. Medical officials say women and children are among the dead.
No one has claimed responsibility for the suicide bombing.
Shortly before the attack, Iraqi Prime Minister Nouri al-Maliki told leaders from the ethnic Turkmen community to stay resolute even if there is a breach of security in Iraq.
Tensions have risen in the oil-rich area as the Kurdish majority seeks to incorporate it into their semiautonomous region despite opposition from other ethnic groups.
The level of violence has dropped significantly across Iraq in the past year. But Iraqi officials have warned that insurgents will increase attacks in an effort to undermine confidence in the country's security forces.
Some information for this report was provided by AFP, AP and Reuters.