QUETTA, Feb 6: Police are reported to have included six Defence Security Guards (DSG) personnel in their investigation into the Sui criminal assault case.

"We have included six DSG personnel for questioning as investigation into the rape case has been expanded," police sources in Dera Murad Jamali said.

Those included in the investigation are: Hawaldar Mohammad Rafiq, Mohammad Khushhal, Omar Farooq, Usman Ali, Mohammad Atif and Malik Khan. Police summoned them to Dera Murad Jamali and interrogated them, the sources added.

Police had earlier arrested Sui plant manager Pervez Jumbola, medical officers Dr Mohammad Usman and Mohammad Ali and another Pakistan Petroleum Limited official, Mohammad Afzal.

The sources said the investigation team led by Deputy Superintendent of Police Mir Karim Bungalzai had summoned.

The DSG officials were summoned for questioning in the light of important information gathered during the investigation.