QUETTA, Pakistan — Shi’ite Muslims hit by a twin bombing that killed 86 people refused to bury their dead Friday, demanding the Pakistani government do more to protect them from increasing violence against the minority sect.

The attack on a billiards hall Thursday night in the southwestern city of Quetta marked a bloody start to the new year after a human rights group said 2012 was the deadliest ever for Shi’ites in the majority Sunni Muslim country.