At least 40 people have been killed and another 60 injured in a suicide bombing along a religious pilgrimage route south of Baghdad, police say.
The attack on Friday in Iskandariya, 40km south of the Iraqi capital, took place as Shia Muslims headed towards the city of Karbala.
Located 80km south of Baghdad, Karbala houses the Imam Hussein shrine.
The bomber had hidden her explosives under an abaya, a traditional head-to-toe garment, and blew herself up just after midday (09:00 GMT).
Most of those killed in the bombing were women and children, Captain Mohammed al-Awad, a police captain in Babil, said.
Sectarian violence
The attacks against the pilgrims appear to be part an extremist campaign to rekindle the sectarian conflict that nearly pushed the country into full-scale civil war two years ago.
A suicide bomber on Thursday detonated an explosive belt packed with nails among Shia worshippers in Karbala near the Imam Hussein shrine, killing eight pilgrims and wounding more than 50 more.
At least 12 people were killed and more than 40 others wounded in bombings in Baghdad the previous day.
The attacks also targeted Shia pilgrims travelling to Karbala.
About 40,000 Iraqi troops have been deployed along major routes to Karbala.
Officials say security cameras have been installed near the Imam Hussein shrine to keep a lookout for possible threats.
The pilgrims will be celebrating Monday's end of 40 days of mourning that follow Ashura, the anniversary of the seventh-century death of the Prophet Muhammad's grandson Hussein.