KARACHI, July 23: Police are groping in the dark for the killers of Khalid Shahanshah, chief security officer of PPP co-chairman Asif Ali Zardari, as no clue has so far been found by the investigators.

Sources said a high-level investigation team, comprising SP Azad Khan, SP Niaz Ahmed Khoso and SP Shahid Hiyat, was formed to probe the murder of the PPP leader. However, they said, no headway was made so far.

The PPP leader was gunned down right at the gate of his Clifton residence on Tuesday afternoon by three to four occupants of a white Alto that had been snatched in the morning from a woman at gunpoint near Korangi Crossing.

Meanwhile, police got prepared a computer-generated sketch of one of the suspects involved in the assassination of the PPP leader.

Sources said the sketch, prepared on the basis of the description provided by a watchman of a bungalow, showed a dark-complexioned suspect in his late twenties. He has been described as a thin man of medium built with stubble.

One of the investigation team members told Dawn that two motorcyclists had deprived a woman of her car which was used by the assassins.