At least 20 people were killed and several injured Friday night when unknown militants opened fire at kidnapped passengers in Mastung area of Balochistan.
Earlier in the evening, suspected militants had abducted two passenger buses en route Karachi from Pishin.
Officials said miscreants stopped two passengers coaches at Khad Kucha area of Mastung. He said the passengers were taken out from the coaches after which armed men opened fire at them.
It happened in the restive province of Balochistan, where separatists have been fighting a low-level insurgency for decades. Islamist militants are also active there.
Five passengers were rescued by security forces, according to local authorities.
The attacks, which left several people injured, have been condemned by the government of Pakistani Prime Minister Nawaz Shari