The security of Adiala Jail has been placed on high alert in view of possible terrorist attack.
According to intelligence report given by law enforcement agencies, there is a threat of attack on the jail by terrorists.
The police have increased their patrolling and security checking on checkpoints in the nearby areas of jail.
Rangers have been posted on sensitive points of jail.
Additional unit of police and rangers officers are positioned within boundaries of jail, whereas commandos are positioned on prison walls.