WFP executive director James Morris spent an hour with NLD officials at the United Nations' offices in Yangon ahead of a meeting later Thursday with Prime Minister General Soe Win before he leaves for Thailand.

"We haven't discussed anything concerning politics," NLD spokesman U Lwin told AFP, adding the sole topic of the meeting during Morris' first Myanmar visit was the humanitarian situation in the country, which has been run by the military since 1962.

Myanmar's largest opposition group, which operates from its dilapidated Yangon headquarters, won a landslide election victory in 1990 but was never allowed to form a government.

Its offices elsewhere have been shut down and its leader, the Nobel peace laureate Aung San Suu Kyi, remains under house arrest despite international demands for her release.

Morris's four-day trip was aimed at discussing the agency's operations in the impoverished country, WFP officials have said.

Morris had been expected to travel to Shan state in Myanmar's northeast, where the vast majority of the country's illicit opium is cultivated, but WFP officials could not confirm the trip.