Not confirmed but not unsubstantiated. A coast guard ship filed reports of them both arriving from out at sea and returning to sea. Also several local sheriffs have observed the same.
The War Zone is always a reliable source for national security related reporting -
The War Zone is always a reliable source for national security related reporting -
https://www.twz.com/news-features/coast-guard-ship-stalked-b...
I feel this story from them would have been a better post for HN audiences.