More than 60 people are believed to have been killed, with up to 180 injured in a bomb blast that decimated a busy market in a Shia Muslim quarter of the Pakistani city of Quetta on Saturday.
Authorities said the attack is believed to have been carried out by Sunni Muslim extremists who regularly target Pakistan's estimated 20 million Shias, according to AP.
Wazir Khan Nasir, deputy inspector general of police in Quetta, told: "The explosion was caused by an improvised explosive device fitted to a motorcyle. This is a continuation of terrorism against Shias."
Smoke rises from the site of a bomb blast in a market in Quetta, Pakistan
He said the bomb was detonated by remote control and officers are believed to be investigating whether the bomb was planted in a rickshaw.
Many of the victims were women and their children, shopping for the evening meal. The wounded have been take to three different hospitals.
Shiite protesters have demanded action from authorities, and tighter protection. They blocked roads, burnt tyres and threw stones at official vehicles. Police have since cordoned off the area.