Ban's statement was met with surprise and wariness by relief officials here, not least because the pledge was delivered on the eve of an international donor's conference in Myanmar this weekend. While the junta has largely ignored international criticism of its slow response to the May 3 storm, which left some 134,000 people dead or missing, it is now asking for $11.7 billion in reconstruction money. That is nearly as much as Myanmar's annual gross domestic product.

Ban did not release details of his discussions with junta or whether it was now promising a free flow of what aid officials say is desperately needed relief. He gave no indication when the Myanmar government would allow aid workers to enter the country and whether they would be allowed to travel to the badly hit Irrawaddy Delta.

But he told reporters traveling with him: "I had a very good meeting with the senior general, particularly on these aid workers."

Taken off guard, relief officials said a key issue would be whether the relief workers would be allowed free access to hard-hit areas where the United Nations says aid has reached only 25 percent of the storms 2.4 million victims.

Although the United Nations says more than a million people are still in urgent need of food, water, shelter and medical supplies, the junta insists that "the emergency phase of the operation is over" and that international donors should focus on reconstruction, which would include instead large amounts of machinery and materials.

"This discrepancy is a confidence gap that has to be verified, that has to be reconciled," said the Asean secretary general, Surin Pitsuwan. "Whether the Sunday pledging conference will be successful or not depends on the ability to reconcile the difference."

He added that without international access to the worst-hit areas, "the shared concern is we don't know the extent of the damage."

"We don't know the number of the missing or the number of the displaced," he said.