The incident has come as a shock to experts who said that handling of radioactive materials like Caesium-137 is highly regulated with strict protocols for their transport, storage and disposal.

Missing: A photo of the missing container holding a Caesium-137 well logging capsule, shown inside a protective housing which was not lost.Photo: TNG GROUP ...

But the capsule in Australia and the cylinder in Thailand contained Caesium-137, a highly radioactive substance that’s potentially lethal.

Caesium-137 is the most common radioactive form of caesium, emitting beta particles and gamma rays, according to the U.S. Environmental Protection Agency. Exposure to it can increase the risk of ...

Used for measuring ash, the cylinder was part of a silo and contains Caesium-137, a highly radioactive substance that scientists say is potentially lethal.

The 12-inch-long cylinder containing the radioactive material Caesium-137 was reported missing on March 10 from a piece of machinery at a steam power plant in Prachinburi province, 102 miles east ...

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Caesium-137 is an extremely toxic radioactive isotope formed through nuclear fission. It can cause cancer years after it is inhaled, eaten or absorbed into the body.

Caesium-137 has a half-life of about 30 years, which means it could pose a risk to the population for decades to come, if not found.