At least 50 persons were killed while over 70 others injured when a huge blast ripped through a mosque in Khyber Agency on Friday. According to the media reports, the blast took place in a mosque at the Ghondi area of Jamrud of the Agency. Hundreds of people were offering Friday prayers inside the mosque when the explosion occurred. Some reports said over one hundred people were inside the mosque hit by the blast while others put the number at 500 to 700 people. At least 50 persons were killed while more than 70 were injured in the blast. The entire building of the mosque collapsed following the blast, according to the reports.