Argentinian authorities have declared a national alert following the theft of a capsule containing highly radioactive cesium-137 from a hospital in Rosario. The material, used in radiotherapy equipment, was reportedly stolen from the hospital grounds. While the isotope is contained within a protective capsule, a breach could lead to significant nuclear contamination and pose a health risk. A nationwide search is underway to locate the capsule, and authorities are working to assess potential hazards. The incident has prompted concerns about radiological security and emergency response protocols. Officials are urging public caution and providing guidance on identifying and reporting any suspicious findings. The theft is being investigated as a serious security breach with potentially far-reaching consequences.