A suicide bomber detonated an explosive vest in the middle of a Shi'ite Muslim gathering in Baghdad, killing at least 17 people and wounding more than 50 on Saturday, police said.
 
 
The explosion went off inside a tent filled with people taking part in Shi'ite Ashura rituals, mourning the killing of Prophet Mohammad's grandson Hussein in the 7th century.
 
 
The tent was set up in a crowded market in the city's northern al-Shaab district.