Essex Police say 50 officers and special staff are continuing to investigate the cause of a fatal house fire in Harlow.
Dr Sabah Usmani and her five children were killed in the blaze last week. Their father, Dr Abdul Shakoor, was the only survivor.
Essex Police say they expect the full forensic results to be available by Thursday of this week, but that because of the importance of the case a second independent forensic expert will also look at the findings. The force will not release anything until they get these findings back.