At least three children were injured in a grenade attack on the election office of a Pakistan People's Party candidate in the industrial town of Hub, media reports said.

Police told Dawn News that unknown motorcyclists attacked the election office of PPP’s Balochistan Assembly candidate Mir Ali Hassan Zehri near Jumma Khan Hotel.

Police shifted the injured children to a nearby hospital for treatment.

Zehri was not present in the office when the blast occurred.

The grenade attack took place at a time when Pakistan is gearing up to vote in the general polls on February 8.