The World Bank said they are concerned pressure is growing in Thailand to restrict rice shipments, worsening a global food crisis.
"If a key exporter like this limits foreign sales, it would be very much like Saudi Arabia reducing oil exports,'' James Adams, vice president of the World Bank's East Asia and Pacific department said.
A grain analyst from the Japanese firm, Kanetsu Asset Management Co said that any move by Thailand to limit exports would create panic in the global market.
Thailand faces more pressure to impose export constraints if other regional countries follow suit.
However, Prime Minister Samak Sundaravej said there would be no measures by the government that may distort rice prices.