Iranian nuclear scientist Shahram Amiri, whose disappearance one year ago led to allegations of a CIA kidnapping, has surfaced in the United States, Iranian news outlets reported Tuesday. Amiri sought refuge in Pakistan's U.S. embassy, and asked to return home.

Amiri, a physicist, went missing last summer after arriving in Saudi Arabia for a religious pilgrimage. U.S. officials had reported that Amiri defected to the United States, while Iranian officials angrily accused America of kidnapping.

Last week, Iranian officials submitted documents to the Swiss embassy detailing alleged evidence that Amiri had been kidnapped. The Swiss embassy handles American interests in Iran.

In recent months, three videos supposedly showing Amiri have surfaced, each suggesting a different reason for the scientist's disappearance. One video said he was living freely in the U.S., a second said he had been kidnapped, and a third said he was kidnapped but subsequently escaped.

The third video, broadcast on Iranian state TV in June, showed a man identifying himself as Amiri, who said he had “succeeded in escaping US security agents in Virginia,” and added, “I could be rearrested at any time.”

Dr. Mustafa Rehman of the Iranian section of Pakistan's embassy is reportedly planning to return Amiri to Iran. Pakistan's embassy in the U.S. handles Iranian interests as well, since Iran has no embassy in the country.