Feb 15 (ST) National Unity Govt is exploring ways and means of delaying the investigation report on alleged war crimes in Sri Lanka being presented at the UNHRC next month. Govt wants it taken up only in September. The investigation led by three experts, Marti Ahtisaari, former President of Finland, Sylvia Cartwright, former High Court Judge of NZ and Asma Jehangir, former President of HRC of Pakistan