Unidentified gunmen attacked two passenger buses near Macch area of Balochistan’s Bolan district late on Thursday, killing three people and injuring six others.
Some of the passengers were abducted by the attackers as well, a private TV channel reported.
Sources said unidentified assailants came out of nearby hills and opened fire on two passenger buses near Mach, spread chaos among the passengers.
The Sadiqabad-bound buses were coming from Quetta.
Initial reports suggest the attackers took some of the passengers hostage.
The injured were transferred to a hospital in Quetta.
The incident forced a blockade of traffic on Quetta-Jacobabad highway.
Other reports said a clash had erupted between the attackers and paramilitary forces after they attacked the passenger buses.
According to security sources, the exchange of fire between the attackers and forces had in fact led to the blockade of the main highway.