At least four labourers were injured when unidentified men hurled a hand grenade and opened fire at a construction company in the Mangocher area of the Kalat area in Balochistan on Saturday, sources said.

They were shifted to the rural area centre of the area.

Last month, a member of the Levies and two other people were shot dead in two different firing incidents in the Mastung and Kalat districts.

Unidentified assailants had barged into the house of a Levies official in the Johan area of Mangochar town of Kalat district and opened fire, killing him on the spot and injuring his wife.

The body of the Levies man and the injured woman was shifted to Kalat district hospital.