At least two people were killed and four others injured in an explosion and firing here on Thursday night.
Police sources said that four people were injured in the explosion at Bacha Khan Chowk. Two children were also among the injured, they added.
Police officials said unknown miscreants had planted explosives in a motorcycle parked on the roadside. The bomb blast smashed glasses of nearby shops and vehicles parked on the road.
The injured were rushed to Civil Hospital Quetta for medical treatment.
In a separate incident, unidentified armed men opened fire on a house and killed two persons in Khilji Colony area of Quetta.
Police officials said that the assailants sped away on their motorcycles after the incident.
In yet another incident, militants hurled a hand-held bomb at the residence of a government officer in Wahdat Colony area of the provincial capital.
Police officials said that the blast damaged a small portion of the house, whereas no human loss was reported as a result of the explosion.
There has been no immediate claim of responsibility for the terrorist attacks. However, the province is plagued by violence carried out by Baloch militants along with growing sectarianism.
Balochistan has been experiencing violence and targeted killings since more than a decade. Al Qaeda-linked militants also operate in the region. The province shares borders with Afghanistan and Iran.