BAGHDAD (AP) – Bombs hit Shiite pilgrims in Baghdad and a central Iraqi city Thursday, killing at least 27 people and wounding scores more, in the latest attack in the lead-up to Ashoura, the sect's most solemn annual rite.

The blasts raised fears of more bloodshed as hundreds of thousands of Shiites head to the holy city of Karbala in central Iraq for ceremonies Sunday to mark the climax of the religious observance.

Ashoura's 10 days of mourning are in remembrance of the killing of the Prophet Muhammad's grandson, Imam Hussein, in a 680 A.D. battle that sealed the split between Shiites and Sunnis.

Authorities said twin bombs killed at least 13 people and injured 74 others in the central Iraqi town of Hillah, the capital of Babil province, which is located about 95 kilometers south of Baghdad. The explosions hit a busy bus terminal where many Shiite pilgrims had gathered.

Abandoned shoes lay in puddles of blood as shell-shocked survivors sat in front of damaged storefronts.

"As people gathered here, a powerful blast took place," said witness Ali Hussein. "A bomb exploded there and a car bomb exploded here."

Hours later, a bomb targeting a funeral in Baghdad killed nine and wounded 33 in a predominantly Shiite neighborhood, police and hospital officials said. The officials spoke anonymously because they were not authorized to speak to media.

It was unclear if the attackers thought they were targeting an Ashoura procession, when devout Shiites beat themselves with swords and other instruments to show their devotion and mourning for Imam Hussein.

Also in Baghdad, another bomb killed five Shiite pilgrims and wounded 18 others on their way to Karbala, police and hospital officials said.