A capsule containing radioactive cesium-137 has gone missing in Argentina, triggering a national emergency response. The material disappeared from a medical institute where it was stored in a lead container. Authorities were alerted to the loss and have initiated emergency protocols to locate the capsule. The incident has raised concerns about potential health and environmental risks, though the level of immediate danger remains unclear. A search operation is currently underway, focusing on a route the capsule may have taken during transport. Officials are working to determine how the material was lost and to prevent any potential contamination. The disappearance is being treated with high priority due to the hazardous nature of the radioactive substance.