戈亚尼亚事故

Also known as Goiania accident

The Goiânia accident, also known locally as, also known locally as the Caesium-137 Accident was a radioactive contamination accident that occurred on September 13, 1987, in Goiânia, Goiás, Brazil, after an unsecured radiotherapy source was found by looters at an abandoned hospital site in the city. It was subsequently handled by many people, resulting in four deaths. About 112,000 people were examined for radioactive contamination and 249 of them were found to have been contaminated.