LAHORE Capital City Police Officer (CCPO) Muhammad Aslam Tareen has said that different police teams have started investigations to probe into the killings of parents of Justice Javed Iqbal's on various lines while no clue has yet been found. After attending the funeral prayers of the parents of Justice Javed Iqbal here Wednesday, he said that an investigation team headed by himself comprising SP cantonment and SP Investigation to investigate the case. To a question about the arrest of servants, he said that they have been taken into custody for investigation. To a question about postmortem report, the CCPO said that there were marks of torture on their bodies and smothering might caused their death.