In his letter to UN Deputy High Commissioner for Human Rights, Katy Gilmore, Stalin alleged "serious human rights violations" by the Sri Lankan armed forces during the peaking of hostilities in 2009.
"Lakhs of Tamils are still missing (since then) and the Sri Lankan government has not come up with any constructive mechanism to find them out," he said.
Even after the UN intervention for independent and credible investigation into war crimes, Colombo has not done anything in this regard, he alleged.
"Therefore, the personal intervention of the UN Human Rights Council is the need of the hour to protect the Tamils living in Sri Lanka," he added.
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Pressing for a "reliable independent investigation" by international judges into the alleged war crimes on Tamils, he said they also required a "meaningful political solution," which was long "overdue."
"I am sure that it can only be ensured by a referendum among Ealam Tamils including Tamils living abroad."
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