At least four persons were injured in a grenade blast in Anantnag town of South kashmir . According to the details unidentified militant hurled a grenade near Ganjiwara this afternoon . the grenade exploded with a big bang resulting in damage to above one dozen vehicles and injuring four persons . the injured persons have been evcauated to district hospital Anantnag. The security forces cordoned the area to arrest the culprits .