The head of the International Atomic Energy Agency says Iran appears to have suspended its uranium-enrichment activities, as it had promised.

Mohamed ElBaradei told reporters Monday, at IAEA headquarters in Vienna, he thinks "pretty much everything has come to a halt" at Iran's nuclear laboratories, but that the U.N. agency will need a few days to verify Tehran's compliance.

Mr. ElBaradei says the IAEA should have a definite answer about Iran's uranium-enrichment work by Thursday. The enrichment process can be used to produce either nuclear fuel for peaceful purposes (such as reactors to generate electricity) or weapons-grade uranium suitable for warheads.

The United States contends Iran is engaged in a secret plan to build nuclear weapons. Last week, President Bush said he has seen evidence that Iran was trying to accelerate its military program ahead of today's deadline.