Unidentified gunmen on Wednesday killed two shopkeepers when they opened fire in a congested market in the southwest of the country, the second such attack in a week.

Unidentified gunmen on Wednesday killed two shopkeepers when they opened fire in a congested market in the southwest of the country, the second such attack in a week.

Police said two other shopkeepers and a passerby were wounded in the attack in central Quetta, the capital of restive Baluchistan province.

"The attackers came on motorcycles and opened fire indiscriminately, killing two cloth merchants and wounding two shopkeepers and a passerby," Quetta police chief Abdul Razzak Cheema told AFP.