Throngs of Shiite Muslims converged on a shrine in Baghdad on Saturday for an annual ritual under heavy security, but a string of attacks outside the capital killed 25 people.

Much of Baghdad was on lockdown in the day for the climax of the rites to mark the death of a revered figure in Shiite Islam, with Baghdad’s security forces looking to deter Sunni militant groups which often target Iraq’s majority community.

Several major roads were closed off and a wide variety of vehicles barred from the streets, as security forces also relied on aerial cover and sniffer dogs.

Three bombings in the capital, including two carried out by suicide attackers, on May 22 killed 21 people, while mortar fire on Friday struck a district adjacent to Kadhimiyah, killing three more.

Outside of Baghdad today, a series of attacks killed 25 people, security and medical officials said.

In the deadliest attack a car bomb exploded outside an alcohol shop in the northern city of Kirkuk, killing 10 people and wounding 33 others.

In Kirkuk province three farmers kidnapped in the early hours of the morning were found beheaded.

Another vehicle rigged with explosives, this time set off by a suicide attacker, targeted an army convoy in Diyala province escorting Iranian workers who had been installing a gas pipeline between Iran and Iraq.

Five people were killed — three Iranians and two soldiers — and 13 people were wounded, including eight Iranians.

Attacks also struck in the restive provinces of Nineveh and Salaheddin, officials said.