A five-part series examines the split between Shia and Sunnis, from its origins shortly after the death of Muhammed in the seventh century to the modern-day upheaval in Iraq. Explore the series.
There were more attacks against Shiite pilgrims in Iraq, including a bombing that was followed by gunfire. This follows horrific bombings Tuesday that left more than 120 dead.
The attacks are blamed on Sunni militants who are seeking to fan the fires of sectarian hatred.
But despite the grave risk involved, pilgrims continue to flow toward Kerbala for weekend rites marking the end of a 40-day mourning period for the death of Imam Hussein, who died in the 7th century.