This story?

https://www.cbsnews.com/amp/news/poland-mystery-divers-gdansk-port-energy-oil-gas-infrastructure/

Coast guards rescued three divers off the northern coast of Poland over the weekend whose dubious explanation of their night-time dive near critical energy infrastructure, along with their mysterious identities, has reportedly sparked a cross-agency investigation. The three men, who told authorities they were Spanish nationals, were rescued near the Polish coastal city of Gdansk on Saturday night after their small motorboat broke down and they couldn't return to shore.

Officers apparently saw nothing suspicious at first in the fact that the men were diving near critical infrastructure at night with no permit and atypical amber-hunting equipment, and the local police did not pursue the matter, releasing the men without further questioning.