The UN atomic watchdog said Tuesday it was still waiting for information from the Kyrgyzstan government about an incident late last year involving radioactive material found on a train bound for Iran.
"We've sent a formal request and we're still awaiting a response," a spokeswoman for the International Atomic Energy Agency (IAEA) said.
According to Kyrgyz authorities, Uzbekistan border guards detected Cesium-137 in a Kyrgyz freight train bound for Iran on December 29.
Cs-137, used in medical devices and gauges, is a by-product of nuclear fission processes in nuclear reactors and nuclear weapons testing.
The affair was not made public until January 10/11.