Four persons have been injured in a grenade blast at the election office of a local political party — Mazloom Olsi Tehreek Pakistan — in Quetta, police said.

Quetta SSP Operations Jawad Tariq told Dawn.com that unknown motorcyclists lobbed a hand grenade at the party’s election office in Mulla Khel Abad area near the Southern Bypass and then fled.

“The grenade exploded outside the election office, injuring four pedestrians,” he said. “The office was closed at the time of the attack due to which people present outside the premises sustained injuries,” he said.

SSP Tariq added that police and the bomb disposal squad personnel had collected evidence from the incident and also cordoned off the area. He said a search was underway to nab the culprits.

Meanwhile, Edhi in-charge Zeeshan Idrees said all the injured persons were shifted to Civil Hospital with the help of locals.

He added that three of the injured were discharged after being provided medical treatment. Idrees added that the one remaining person, identified as Abdul Qadir, was taken to the Trauma Centre for further treatment.