QUETTA: Unknown armed men hurled a hand-held bomb at an office of the Pakistan Muslim League (N) in Arbab Ghulam Ali road area of Quetta on Wednesday, police said.

Police said militants hurled the bomb at the election office of PML-N leader Haji Lashkari Raisani. They said four party activists were injured in the attack.

The injured were immediately rushed to civil hospital Quetta for medical treatment. However Raisani was not hurt in the attack.

Police said armed men were riding a motorcycle and escaped unhurt from the spot. The blast also damaged the election office of Raisani.

Lashkari Raisani is contesting election on PB-4 from Quetta city on the ticket of PML-N. He is the younger brother of former chief minister Balochistan Nawab Aslam Raisani.