The folks at the Eagle Webcam site have reported that the eaglets E24 and E25 have tested positive for avian influenza, so are reporting this as the cause of death for these babies.
They're also monitoring ( as best they can) the activities of M15 and F23, the adult birds, and it sounds like they appear ok so far. I posted the link to CROW's Facebook page where they discuss the test results and some information about avian influenza in birds. It's got a lot of good information, so fingers crossed the link works.

https://https://www.facebook.com/story.php?storFs5HSDHEOL