At least 78 people killed in attack, police tell CNN.

Smoke rises after a bomb attack in a Shi'ite Muslim area of the Pakistani city of Quetta February 16, 2013. Pakistan's Lashkar-e-Jhangvi, which intelligence officials say has become a major security threat, claimed responsibility for the sectarian attack on Shi'ites which killed 47 people in the city of Quetta on Saturday.