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Muslims around the world celebrate Ashura

Ahmad Masood / Reuters

An Afghan Shi'ite Muslim man takes a break as he and others flagellate themselves during a Muharram procession in Kabul, Afghanistan, Dec. 3. Ashura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the 7th century battle of Kerbala.

Dar Yasin / AP

Kashmiri Shiite Muslim children flagellate themselves during a Muharram procession in Srinagar, India, Saturday, Dec. 3.

Fayaz Kabli / Reuters

Kashmiri Muslims boys with their heads bandaged wait inside an ambulance after they flagellated themselves during a Muharram procession in Srinagar, India, Dec. 3. Muslims all over the world mourn the slaying of Imam Hussein, grandson of Prophet Mohammad, during the first ten days of the Islamic month of Muharram. Imam Hussein was killed by his political rivals along with 72 companions in the 7th century battle of Kerbala.

 See images from last year's Ashura here.