A Christian takes communion during Christmas mass at the Fatima Church in Islamabad on December 25, 2012.

Christians offer prayers during a Christmas mass at the Fatima Church in Islamabad on December 25, 2012.

Pakistani Christians sing hymns as they attend a Christmas mass in Karachi on December 25, 2012.

Pakistani Christians attend a mass on Christmas day at a cathedral church in Peshawar December 25, 2012.

Pakistani Christians take communion during a Christmas mass at Saint Antony's Church in Lahore on December 25, 2012.

Pakistani Christians offer prayers during a Christmas mass at Saint Antony's Church in Lahore on December 25, 2012.

Pakistani Christians sing hymns during Christmas mass at the Fatima Church in Islamabad on December 25, 2012.

People attend Christmas service at a local church in Karachi, Pakistan, Tuesday, Dec. 25, 2012.