"¦the circumstances relating to this incident could be perceived as an attempt by the UN authorities in Sri Lanka to shield the LTTE's criminal actions," he said.
The statement was issued after Bogollagama summoned World Food Programme country director Jeff Taft-Dick to complain about the UN agency's failure to report the abduction.
Two UN staff members were abducted and detained by the Tigers in early April while working in the Tiger-held Kilinochchi area, 330 kilometres north of Colombo, but the agency did not inform the government till the end of the month.
The Foreign Ministry statement quoted Taft-Dick as saying the use of the word 'arrest' had been a mistake and that the UN classified it as an 'abduction'.
It said Taft-Dick had told Bogollagama