QUETTA - Two workers of a local goods company were injured when a hand grenade exploded in Hazarganji area of Quetta on Friday night. As per details, unknown assailants hurled a hand grenade on a group of workers and escaped after committing crime. The hand grenade exploded and wounded two workers identified as Imtiaz Rafiq and Hanif. The injured were shifted to hospital for treatment. Police have registered a case ad started investigation.