A Pakistani man, who was injured in a bomb blast, is brought to a hospital in Karachi, Pakistan, Sunday, March 3, 2013. Pakistani officials say a bomb blast has killed dozens of people in a neighborhood dominated by Shiite Muslims in the southern city of Karachi. (AP Photo/Shakil Adil)
Bomb blast kills dozens in Pakistan
A suspected suicide bomber attacked Shi'ite Muslims as they were leaving a mosque in Pakistan's commercial capital on Sunday, killing at least 45 people, in another signal Sunni militants are escalating sectarian attacks.