The Spanish military has pushed back against claims that a sunken Russian freighter carried nuclear submarine parts bound for North Korea, shedding new light on the Ursa Major’s mysterious cargo while finding no evidence that a military attack caused its sinking.

The Ursa Major’s cargo was for a Russian nuclear icebreaker, not Pyongyang’s submarine program, Spanish Defense Minister Margarita Robles told parliament in May, adding that no authority has attributed the sinking to an attack despite circulating claims.

Her remarks came days after Spanish lawmakers and CNN reportedthat the shadow fleet vessel may have carried nuclear reactor parts to