Pakistani people attend the funeral procession of bomb blast victims in southern Pakistani port city of Karachi, March 4, 2013. At least 45 people were killed and 150 others injured when twin blasts hit a residential area in Pakistan's southern port city of Karachi on Sunday night. (Xinhua/Arshad)

Pakistani people attend the funeral procession of bomb blast victims in southern Pakistani port city of Karachi, March 4, 2013. At least 45 people were killed and 150 others injured when twin blasts hit a residential area in Pakistan's southern port city of Karachi on Sunday night. (Xinhua/Arshad)

Pakistani people attend the funeral procession of bomb blast victims in southern Pakistani port city of Karachi, March 4, 2013. At least 45 people were killed and 150 others injured when twin blasts hit a residential area in Pakistan's southern port city of Karachi on Sunday night. (Xinhua/Arshad)