Multiple reports say a Russian ship that sinks in the Mediterranean after an engine-room explosion may have been carrying parts associated with nuclear reactors used in submarines. The allegation is based on Spanish government documents referenced by outlets. According to the accounts, Spanish authorities are assessing what the ship transported at the time of the incident, and the documents indicate the cargo could include components related to submarine reactor systems rather than unrelated industrial material. The ship reportedly goes down after a blast in its engine room, and the incident prompts scrutiny of the vessel’s purpose and supply chain. The reporting emphasizes that the documents point to a possible nuclear-related cargo but does not provide publicly confirmed details on the exact items or quantities recovered. No outlet in the provided excerpts confirms that any reactor components were definitively found, nor do they describe any formal conclusion beyond the documentary indication. The situation remains under investigation as Spain reviews the circumstances and the ship’s declared and possible cargo.