At least 68 people were killed and over 80 injured Friday when two powerful explosions tore through a group of troopers who were boarding buses at their training centre in Charsadda city to go on leave.

The Taliban, which has vowed to avenge Osama bin Laden's killing, claimed responsibility for the attack.

The massive bombings took place at the main gate of the Frontier Corps (FC) training center when the newly-trained troopers were all set to go on 10-day leave, Xinhua reported citing local media reports.