It's possible that the Royal Navy wasn't responsible but not everyone is believing their version of the story.
Environmentalists are trying to establish how 33 whales beached and died off the coast of County Donegal.
They were found on Rutland Island near Burtonport on Saturday.
It's thought they were the same group spotted in the Outer Hebrides at the end of October.
Dr Simon Berrow of the Irish Whale and Dolphin Group said it was one of the biggest mass deaths of whales in Irish history.
He is concerned that Royal Navy sonar equipment could have played a role.
