MEXICO CITY - A metal case of radioactive materials stolen last week has been recovered in Mexico's southeastern state of Tabasco, authorities announced Wednesday.

Contained in a lead-reinforced case, the material Iridium-192 was reportedly stolen from a truck on April 13 in the city of Cardenas. The material is used in mobile medical or industrial radiography.

"For everyone's peace of mind, I report that the case of iridium has been recovered," State Governor Arturo Nunez Jimenez posted via Twitter.

Tabasco's Ministry of Public Security reported the case had been found abandoned under a bridge, but did not say the exact location, or whether any suspects had been arrested, Mexico's La Jornada daily reported.

Mexican firm Garantia Radiografica e Ingenieria reported the theft of the material, to which any exposure could be fatal.

Last year, radioactive material was reported stolen in Mexico on at least three separate occasions.