Shedd Aquarium in Chicago says two whales have died after it took in 10 beluga whales from Marineland in Niagara Falls, Ont.

Shedd says one whale, Rain, came from Marineland in mid-August while the other, Beethoven, was already a resident.

Marineland, along with Shedd and numerous other aquariums, of late completed an unprecedented relocation of captive whales after shipping 30 belugas and four dolphins to five destinations.

In a related development, another Marineland beluga, Peekachu, died last week after it became severely dehydrated.

Shedd says the deaths occurred Wednesday afternoon despite immediately trying to save the whales.

The aquarium says it does not know if the deaths are related, but they are performing tests and necropsies.