At least three dead adult humpback whales are floating in the waters of Lower Cook Inlet and killer whales are suspected.

North Gulf Oceanic Society researchers first spotted the dead humpbacks Sunday near East Chugach Island, Pearl Island and Kachemak Bay.

"Definitely, there's been killer whales on these humpbacks and it's thought they were preyed upon by killer whales," said Barbara Mahoney, a biologist with the National Marine Fisheries Service.

But did the killer whales actually kill the humpbacks, or did they just happen on the carcasses and feed on them?

Visit the Anchorage Daily News for the rest of this story.