Blast in Baghdad left 56 people dead . One suicide bomber left her explosives at the market . Authorities suspect Islamic militant group Boko Haram , which has seized parts of the region and is known to conduct such attacks . A second one set off hers when rescuers arrived at the scene .
Blast in Baghdad left 56 people dead . One suicide bomber left her explosives at the market . A second one set off hers when rescuers arrived at the scene .