The US State Department on Friday renewed calls for Iran to help determine the fate of Robert Levinson, a former FBI agent who went missing on the Iranian island of Kish in March 2007.
"We still do not have definitive information about his welfare or whereabouts," State Department spokesman Sean McCormack told reporters, reading a statement.
"We once again urge Tehran to share any and all information the Iranian authorities have uncovered about the Levinson case, and we ask anyone else who may have information about the case to contact us or the Levinson family," he said.
McCormack said Levinson's wife Christine met Friday with Under Secretary of State for Political Affairs William Burns to discuss her husband's case.
He recalled that Levinson's wife and son visited Iran in December 2007 "in an effort to gather information about his disappearance and to press the Iranian government on his case."
McCormack said that "while the Iranian authorities guaranteed the security of the family during their journey, they provided few details from their investigation."
Christine Levinson says the former FBI agent, who retired from service a decade ago, had traveled to Kish island to investigate cigarette counterfeiting in the region and was last heard of on March 8.
The mystery of Levinson's disappearance is a further strain in relations between the United States and Iran, which have had no diplomatic ties since 1980 and remain at loggerheads over the Iranian nuclear drive.
