Pakistanis light candles during a vigil ceremony for the victims of Peshawar church blasts, in southern Pakistani port city of Karachi on Sept. 22, 2013. At least 78 people were killed and over 146 others injured when a twin suicide bomb attack hit a Christian church in Pakistan's northwest Peshawar city on Sunday, officials said. (Xinhua/Masroor)

Pakistanis hold oil-lamps during a vigil ceremony for the victims of Peshawar church blasts, in southern Pakistani port city of Karachi on Sept. 22, 2013. At least 78 people were killed and over 146 others injured when a twin suicide bomb attack hit a Christian church in Pakistan's northwest Peshawar city on Sunday, officials said. (Xinhua/Masroor)

Pakistanis pray during a vigil ceremony for the victims of Peshawar church blasts, in southern Pakistani port city of Karachi on Sept. 22, 2013. At least 78 people were killed and over 146 others injured when a twin suicide bomb attack hit a Christian church in Pakistan's northwest Peshawar city on Sunday, officials said. (Xinhua/Masroor)

A Pakistani girl holds a candle during a vigil ceremony for the victims of Peshawar church blasts, in southern Pakistani port city of Karachi on Sept. 22, 2013. At least 78 people were killed and over 146 others injured when a twin suicide bomb attack hit a Christian church in Pakistan's northwest Peshawar city on Sunday, officials said. (Xinhua/Masroor)