Clashes between security forces and Bugti tribesmen in various parts of Dera Bugti on Wednesday left four security personnel injured. "Four security men were injured in clashes with Bugti tribesmen in Loti, Samnay and Herog areas," tribal elder Alam Khan Bugti told reporters on telephone. Also, unidentified miscreants fired rockets at Pir Koh and Sui gas field, which missed the target.