Nishan e Haider for Aitzaz Hassan & Ch. Aslam

Aitzaz Hasan, 15, was with friends outside school when they spotted a man wearing a suicide vest.

Despite the pleas of his fellow students, he decided to confront and capture the bomber who then detonated his vest, his cousin told the BBC.

Aitzaz is being hailed as a hero in an outpouring of praise on social media.

There have even been calls for him to receive the army's highest honour awarded to those who have sacrificed their life for their country, though it is unclear if he would be qualified to receive it as a civilian.

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Chaudhry Aslam, was on hit list of terrorists as a day before he killed three dangerous Taliban militants in encounter in Karachi.

He has killed and arrested many key terrorists commanders in past. Taliban had targeted him on many occasions.

Last year his vehicle was also targeted at the same place where he killed in Thursday blast.

In 2011, eight people were killed and several were injured in a suicide attack on the residence of Chaudhry Aslam on September 19.

In 2010 the terrorists blew up the head office of CID in Karachi with the aim to eliminate Aslam and other senior officials. Aslam and other senior officials were not in the building at the time.

The government had enhanced the security of Aslam who had been working against the Taliban terrorists.
As the role of the CID chief is very important in taking action against the Taliban, there were threats that terrorists could hit him any time.

Aslam had vowed to carry on his mission of eliminating the Taliban from Karachi.