Seen no reports, but 'educated guesses' have it this way....
SEALS were in the water, having the boat surrounded, gaining access to the immediate area, via, SUV(SEAL underwater vehicle), initials have changed over the years, could be called, SEAL submersible vehicle, and using 're-breathers', a type of underwater breathing apparatus, that replaces scuba(Self Contained Underwater Breathing Apparatus) tanks, that produces no bubbles, for detection,..waited for their moment, via distraction, and/or fatigue, being as the perps were dogged day and night with helicopters, and very bright lights from them, at night. When the order came, it would be swift and lethal. The fact that there was one surviving perp, would be more than likely an order to take one or as many as they could for Intel. Gathering information, is far more a priority, than producing everyone terminated.
   See if that matches details when they come out!