At least three people were killed and 20 others injured on Tuesday as a bomb blast hit a pilgrims' bus in Pakistan's southwestern province of Balochistan, local media reported. The bomb blast targeted a bus carrying pilgrims in the Deen Garh area of Mastung, a district of Balochistan. The bodies and injured were admitted to the district hospital in Mastung. Rescuers told local media that the death toll might further rise as the bus caught fire after the attack and some passengers were feared to be trapped inside. The blast stroke one of the three buses that were coming from Iranian city of Taftan to the provincial capital of Quetta. No group has claimed responsibility for the attack yet.