It is hard to find info on the Ukrainian Navy SEALs, but they do have them as part of the Special Operations units.
“The Ukrainian Naval Infantry maintains its own small Spetsnaz force in the form of the 73rd marine Spetsnaz detachment; the detachment is named “Seals” after the United States Navy SEALs and is built around the same purpose.”
Read it on reddit. Read it on Wikipedia.
If true, the attack was in part against a NATO member and within the waters of several other NATO members. Sounds like, if the Ukrainians did this, then it was an attack on NATO as well as Russia, and an attack within the sea borders of NATO itself.
On the other hand, noting verbiage, "a pro-Ukrainian group" could be many different entities, which could be described in the same manner, are potentials. Ergo, "New intelligence reviewed by U.S. officials" is of no informational value, for it is much like the media game of "experts say" and "unnamed sources under condition of anonymity" say....
This is what passes for news today. None accountable. All suspect. And with lots of wiggle room and generalities.
As to the Wiki source, one can look to the many recent edits:
https://en.wikipedia.org/w/index.php?title=Special_Operations_Forces_(Ukraine)&action=history