QUETTA, Pakistan -- Unidentified assailants have gunned down four policemen in the southwestern Pakistani city of Quetta, RFE/RL's Radio Mashaal reports.
There has been a surge in targeted killings over the past two months in Quetta, the capital of Baluchistan Province.
In the latest attack, gunmen on motorcycles opened fire on a police vehicle, killing all four of its passengers.
The attack occurred in the upscale Satellite Town of Quetta.
No one has claimed responsibility for the attack.
In the past, ethnic Baluch nationalists have claimed responsibility for most of the targeted killings in the province.
Baluch nationalists say they are fighting for more rights from Pakistan's federal government. They say the central government is dominated by ethnic Punjabis.
The nationalists also say that Baluchis receive less than their fair share of the province's natural-resource wealth. Baluchistan has the country's richest oil and gas reserves.
A Mashaal Radio reporter in Quetta learned that one of the four policemen killed today was an ethnic Baluch. The other three policemen were ethnic Pashtuns.
The majority of the victims of the recent attacks have been ethnic Punjabis and police officials.
The low-level Baluch insurgency started in 2004 and has left hundreds dead.