BAGHDAD — Iraqi police and hospital officials said an attack late Thursday carried out by multiple suicide bombers on a Shiite shrine north of Baghdad killed 26 people and wounded 52 others.

Police officials said the attack began when a suicide bomber targeted police guarding the entrance to the Sayyid Mohammed shine in Balad, 50 miles north of the capital of Baghdad. A second bomber entered the shrine with nine gunmen targeting security forces as well as families gathering to celebrate Eid al-Fitr, the holiday marking the end of Ramadan.

Police officials said a third bomber was killed.

No group claimed responsibility for the rampage, which came less than a week after an Islamic State-claimed truck bombing in Baghdad marked the deadliest attack in Iraq since the 2003 U.S.-led invasion.

Anger and protests mounted earlier Thursday at the site of the truck bombing, where the death toll rose further with more remains recovered.

The attack had stoked public unrest and spurred Iraqi officials to announce a number of new security measures.

Iraqi hospital and police officials said that their death toll from Sunday's attack now stood at 186 people, with around 20 still missing.

But Ahmad Roudaini, from the Health Ministry's media office, said the ministry's death toll is 292.

The discrepancies in the numbers could not be reconciled.

On Thursday evening, a crowd of angry friends and family members of the victims tried to push into one of the buildings hit in the truck bombing, but civilian volunteers held them back.