Unidentified militants on Tuesday night fired two rockets at a National Logistics Corporation (NLC) stone crushing plant in Kingri tehsil, Musakhail district, residents said. The militants also fired light arms at the plant for almost an hour. The rockets fired at the plant landed in an open plot without causing any damage. Meanwhile, the residents of Rarraisham, a neighboring village, suspected the involvement of Marri militants in the incident. Police and personnel of other law enforcement agencies arrived at the site soon after the incident and started searching for the culprits. However, police did not confirm the incident when contacted.