Pakistani authorities have launched a hunt for militants behind a suicide bomb blast targeting Christians that killed at least 70 people. Yiming Woo reports.
Investigators search for clues in the hunt for militants behind Sunday evening's deadly suicide attack in Lahore. A bomb exploded at a park filled with Christians celebrating the Easter weekend. At least 70 people are dead, most of them women and children. Another 300 were wounded. A Pakistani Taliban faction has claimed responsibility and issued a direct challege to the government. Witnesses to the bombing are calling for better security. (SOUNDBITE) (Urdu) WITNESS MOHAMMAD ARSHAD, SAYING: "I was standing there near the see-saw when this blast happened. The explosion was very loud. As we rushed here we saw a pool of blood and people lying here and there. There is no proper security arrangement here. There should be good security arrangement in place here." Lahore is the capital of Pakistan's richest province, Punjab, and is widely seen as the political heartland of Prime Minister Nawaz Sharif. The Pakistani Taliban are fighting to topple the government and install a strict interpretation of Islamic law.