The fatal shooting of an attempted robber by a clerk at a southwest Houston cellular phone store will be referred to a Harris County grand jury without charges, police said today. The shooting happened shortly before 7 p.m. Monday after the man entered the T-Mobile store in the 7500 block of the Southwest Freeway and pointed a pistol at two employees, police said. A third employee, who is licensed to carry a concealed handgun, confronted the man and the two exchanged shots, investigators said. The attempted robber died at the scene. The employee was not injured. The dead man's name was withheld, pending positive identification by the Harris County Medical Examiner's Office. The investigation is continuing, police said.