Warning, Apology from Failed Pakistani Suicide Bomber
He told the television stations he had been recruited by a man called Qari Zafar, who told him and other students they would go to Afghanistan to kill non-Muslims.
Omar said that when they got to Dera Ghazi Khan he told his handlers there were no non-Muslims there but that his handlers told him the people there were worse than non-believers.
The 14-year old also pleaded with other children training for suicide missions not to carry out attacks, saying such actions are forbidden by Islam.
Sunday's attack on the Sakhi Sarwar shrine was the deadliest bombing in Pakistan so far this year. It came as thousands of people were gathering for a religious ceremony.
The Taliban has claimed responsibility.
Islamist militants routinely target Pakistan's religious minorities. In the case of Sufis, hardline Sunni Muslim groups believe their visiting of shrines amounts to blasphemy against Islam.
An attack on a Sufi shrine in the eastern city of Lahore last year killed more than 40 people.