Pakistan has held 216 suspects after a major sweep by the military and the police saw more than 5,000 detained over the Easter Sunday suicide bomb attack.
Prime Minister Nawaz Sharif vowed to crack down on Islamist militants in the country after the attack in Lahore claimed the lives of more than 70 people, including 29 children.
Pope Francis condemned the Easter Sunday suicide bomb in Lahore, Pakistan - which killed 70 people, including many Christians - as "hideous".
Addressing crowds in St Peter's Square, he demanded Pakistan's government afford more protection to religious minorities.
The Pope described last night's attack as a "vile and senseless crime".
Users thousands of miles from Lahore have reported being asked to check in safe following the bombing which killed at least 65 people.
Police say at least 280 other people are injured, and most of the dead and injured are women and children.