QUETTA: Unidentified militants killed an on duty policeman on Quetta's troubled Sariab Road on Tuesday.

Police sources said that motorcyle-riding assailants opened fire on a police head constable killing him on the spot.

Frontier Corps (FC) and police personnel reached the spot soon after the incident and shifted the policeman's body to Civil Hospital Quetta for autopsy.

The incident occurred a day after a deadly blast ripped through a local bus in the same area of the city killing 11 people and injuring around a dozen.

Read: Terror attack shakes Quetta

Case registered over bus blast

Police have registered a case against an unknown accused in connection with the Sariab road, blast which left at least 11 people dead in Balochistan's provincial capital.

Around two dozen people sustained injuries in the blast that ripped through a local bus in one of Quetta's busiest and sensitive areas late on Monday.

The Spokesman for Quetta police, Javed Gharsheen said the case was registered under the Anti-Terrorism Act and the Explosive Act against the unknown terrorists by Station House Officer (SHO) Sariab police station.

Police and other law enforcement agencies personnel conducted late night raids in Sariab Road area and other parts of Quetta.

However, Gharsheen preferred to avoid sharing information with the media with regard to the arrests of suspects.

Security was beefed up in Sariab road and other surrounding areas of Quetta following the blast.

Balochistan has been experiencing incident violence and targeted killings since more than a decade. More than 1,400 incidents targeting the minority Shia and Hazara community have taken place in the province during the past 15 years.

The largest province of the country by area, is home to a low-level insurgency by ethnic Baloch separatists. Al Qaeda-linked and sectarian militants also operate in the region.

The province shares borders with Afghanistan and Iran.