A capsule of Cesium-137, a radioactive material used in nuclear medicine, was stolen in Rosario.

A national alert has been issued following the theft of a radioactive capsule containing cesium-137 from a laboratory in Rosario, Argentina. The incident occurred at a medical institute located on Rioja Street, number 1500, in the city's central area. Authorities have confirmed that the missing capsule had an activity level of 103 milicuries (mCi). This substance is used for calibrating equipment in nuclear medicine and was stored in a lead-shielded container designed to prevent radiation leakage.

The disappearance was detected when technical staff attempted to access the capsule for calibration purposes. They discovered that the capsule was no longer in its designated storage location. According to reports, the last recorded use of the material had taken place several days prior. After that procedure, the capsule was supposed to remain securely stored within its protective casing on a countertop in a restricted-access section of the laboratory. Investigators are now trying to determine whether there were internal control failures or unauthorized removals of the device. They are also examining whether there are audiovisual records that could help reconstruct the sequence of events leading up to the theft.

Cesium-137 is a radioactive isotope that has been widely used in scientific, industrial, and medical fields for decades. In healthcare, it is commonly employed to calibrate nuclear medicine instruments and was previously used in radiotherapy treatments. It emits both beta and gamma radiation, which necessitates strict safety measures during storage and transportation. Experts emphasize that as long as the encapsulated material remains intact and protected, the risk to the public is minimal.

Authorities are particularly concerned about the possibility that the capsule might be mishandled by individuals unaware of its contents. Gamma radiation emitted by cesium-137 can penetrate tissues and various materials. Prolonged exposure to an unprotected source could result in radiation burns, damage to internal organs, harm to bone marrow, and an increased risk of developing cancer over time. Therefore, experts strongly advise anyone who encounters a suspicious metallic object or a container matching the description released by authorities not to open, handle, or attempt to move it themselves.

Only four individuals had access to the substance, according to local media reports. The investigation aims to identify when the material disappeared and who was the last person to have contact with it. Investigators are reviewing internal records of the facility and analyzing movements within the secured area where the capsule was kept. The focus of the inquiry includes determining whether there were lapses in internal controls or if someone removed the device without authorization. Additionally, they are looking into potential audiovisual evidence that might provide insight into the circumstances surrounding the theft.

The stolen capsule was part of specialized equipment used in the functioning of medical devices. Its absence has raised significant concerns due to the potential dangers associated with improper handling. The situation has prompted a nationwide alert, emphasizing the need for heightened vigilance and cooperation from the public. Officials are urging citizens to report any sightings of the capsule or similar objects immediately to the relevant authorities.

As the investigation continues, officials are working to trace the capsule’s whereabouts and ensure that it does not fall into the wrong hands. The incident underscores the importance of stringent security protocols for handling radioactive materials, especially in medical facilities. The authorities are likely to conduct a thorough review of existing procedures and possibly implement additional safeguards to prevent future occurrences. Meanwhile, the community remains on high alert, awaiting further updates from the investigating bodies.