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"It's most likely that the artworks were accidentally taken away with the trash," they said.
A report by investigators found that some of the artworks were stored in wheelie bins in the basement and were "not handled with care", according to local newspaper Algemeen Dagblad.

Warhol print of former Dutch Queen Beatrix accidentally thrown away
A print of Queen Beatrix is among 46 artworks officials fear will never be recovered.
