The blast took place at a construction company in Kot Barozai area of Sibi. According to sources, two workers were injured in the blast.
Sources said that the blast took place while carrying a sack of cement and the injured workers are said to be from Punjab.
As soon as the information was received, the Levies Force reached the spot. The Levies Force cordoned off the area. The Levies Force is conducting further investigation.
It may be recalled that earlier, an officer was killed and two others were injured in a bomb blast at Babar Kuch sub-tehsil of Sibi.
However, no one has yet claimed responsibility for the two attacks.