The deceased were identified as Seema, 13, Abdul Razzak, 30, and Abdul Ghani, 35.
Hospital sources said that out of six wounded, still under treatment at the hospital, the condition of a girl was stated to be serious. Rest of the injured were discharged from the hospital after treatment, hospital sources said.
Majority of the passengers were resident of Karachi, who were retuning from Gawadar, police said. However, police were clueless about the coach driver who was believed to have escaped from the hospital after getting treatment.