By Dinasena Ratugamage in The Island, July 8, 2023Tamil National Alliance (TNA) MP M.A. Sumanthiran on Friday said that the excavation of a supposed mass grave of LTTE cadres at Kokkuthuduwai, Mullativu, was not being carried out according to international standards. The excavation of the alleged mass grave site commenced on Thursday (06) following an order of the Mullaitivu magistrate.On 29 June, officials of the National Water Supply and Drainage Board (NWSDB) found human skeletal…