French authorities formally close their investigation into the death of former South African minister and ambassador Nathi Mthethwa, according to reporting from IOL. The move brings an end to the long-running mystery surrounding the circumstances of his death in France.

The available accounts focus on the administrative conclusion of the probe, stating that authorities have officially closed the investigation. Because no further details about findings, causes, or investigative outcomes are provided in the supplied excerpts, the differing angles across outlets cannot be assessed beyond the shared confirmation that the inquiry has ended.

Overall, the key point across the sources provided is the closure of the French investigation, which signals that French authorities are no longer pursuing the matter through that specific investigative process.