Addressing the 69th anniversary of independence celebrations here, Sirisena said the country must strive to achieve economic independence.
"We are determined and dedicated in our commitment despite the work of some opportunists. The government would work towards a knowledge and innovation based economy," Sirisena said blaming them for their aiming of narrow political gains.
Succeeding former President Mahinda Rajapaksa, Sirisena unity government had set in a series of reconciliation measures.
Sirisena's work to hand back Tamils the land held for military purposes and release some of the former terrorist suspects have raised criticism from Rajapaksa's joint opposition who claim that Sirisena was appeasing the Tamils and putting the country's national security at risk.
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While the national ceremony was happening here, a section of the hardline Tamils held a demonstration in the northern capital of Jaffna.
"Our land issues, detention of our people and disappearances have not been addressed. We want an international investigations on crimes against Tamils," Shivajilingam said.
According to the UN figures, up to 40,000 civilians were killed by the security forces during Rajapaksa's regime that brought an end to nearly three-decades long civil war in Sri Lanka with the defeat of LTTE in 2009.
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