Thai Prime Minister Samak Sundaravej is heading to Burma to urge military rulers to allow aid agencies to help victims of the devastating cyclone.Western nations want Mr Samak to persuade the junta to relax its stance on letting foreign experts in.
The European Union's aid commissioner, Louis Michel, is also due in Burma today for talks on the same issue.
Forecasters are warning that another tropical storm is forming in the sea near Burma's largest city, Rangoon.
"The potential for the development of a significant tropical cyclone within the next 24 hours is good with the only limitation being temporary land interaction," the Hawaii-based Joint Typhoon Warning Center said on its website.
On Tuesday, the UN warned more people would die in Burma without a greatly expanded humanitarian relief operation.
It said it had only been able to reach 270,000 of the 1.5 million survivors, more than 10 days after the Cyclone Nargis struck.
'Not necessary'
The Thai prime minister's plane left a military airport in Bangkok loaded with relief supplies, including satellite phones to help the relief effort.
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