According to police, a blast occurred at Kuchlak Bazaar near the venue of an ANP rally and was followed by intense firing that killed four people including an ANP leader Malik Qasim and an eight-year-old boy.
Ten people including ANP’s provincial president Aurangzaib Kasi and his wife were also injured in the blast.
Security forces cordoned off the area while rescue teams shifted the injured and bodies to Civil Hospital and CMH, Quetta.
Two vehicles were also damaged in the explosion while seven kilograms of explosives were used in the blast that were fitted in a bicycle, bomb disposal squad said.
Several political parties condemned the blast and demanded immediate action against the perpetrators.