Interior Minister Mohsin Naqvi and provincial authorities in separate statements condemned the attack and ordered local authorities and police to trace and arrest those who orchestrated the attack and killed innocent laborers.
Authorities said the victims were from the country's northwestern Swat Valley and other areas in the Khyber Pakhtunkhwa province, which has witnessed a surge in militant attacks in recent years.
A roadside bomb struck a vehicle carrying coal miners in restive southwest Pakistan on Friday, killing at least 11 people and wounding five others, officials said.
Wasim Baig, a spokesman at a hospital, said medics received nine bodies and two others who were critically wounded died at the hospital.
Though no one claimed responsibility, the suspicion is likely to fall on the outlawed Baloch Liberation Army separatist group which has been blamed by the government for such previous attacks on laborers from other parts of the country.
