Iran has accused the United States of forging documents and other intelligence to the U.N. nuclear watchdog agency that says Iran had studied ways to make atomic bombs.

In a letter to the International Atomic Energy Agency made available to reporters Saturday, Iranian envoy Ali Asghar Soltanieh accused the U.S. of providing the agency with forged documents.  He said the U.S. has no credible evidence that Iran is pursuing nuclear weapons.

The U.S. and other Western nations have accused Iran of enriching uranium to build a nuclear bomb.  Iran has repeatedly denied this, saying they are only pursuing nuclear energy.

Last month, the IAEA  issued a report saying Iran is continuing to enrich uranium, though at a slower rate than previously reported.  the IAEA also said Iran's government was cooperating with U.N. inspectors, but would not answer questions about whether its program has military components.

In its August report, the IAEA said Iran has increased the number of uranium-enriching centrifuges by around 1,000 to 8,300, but the report said the number of centrifuges that were actually functioning had decreased. 

The IAEA also criticized Syria for not fully cooperating on efforts to address allegations it was building a covert nuclear reactor on a remote desert site that was bombed by Israel in 2007.

Some information for this report was provided by AFP, AP and Reuters.