QUETTA: Suspected tribal militants fired rockets at a security forces' checkpoint and a telecommunications building in separate attacks on Tuesday, officials said. No one was reported injured. Three rockets landed in a field near a paramilitary post in Dera Bugti, said District Coordination Officer Abdul Samad Lasi.In a separate attack, assailants fired two rockets at a telecommunications tower in Bolan, southeast of Quetta, police official Ilahi Bakhsh said. The rockets missed the tower but landed nearby, shattering windows in a building at the tower's base, Bakhsh said. On Monday, gunmen fired assault rifles at a passenger train shortly before it was derailed by a bomb explosion. No one was reported injured.