COLOMBO, Sri Lanka — Sri Lanka’s government criticized on Friday a United Nations’ report on the conclusion of island’s civil war, saying the allegations against the government are ‘‘unsubstantiated and erroneous.’’

In a response to an internal review of the world body released last week, the External Affairs ministry said the report ‘‘appears to be another attempt at castigating Sri Lanka for militarily defeating’’ the Tamil Tiger guerrillas, who fought for a separate state in the Indian ocean island.