The thieves pulled off one of the biggest art heists in years, stealing paintings by artists such as Pablo Picasso, Claude Monet, and Henri Matisse, according to the Star Tribune.
Police didn't said how the thieves executed the robbery, which occurred around 3 a.m., according to the Star Tribune. Police arrived at the museum at 4 a.m., five minutes after an alarm was triggered.
Art experts said that the paintings are would be worth hundreds of millions of dollars if sold legally at auction. They also noted that this is now nearly impossible.
The paintings were part of the Triton Foundation collection, which is being exhibited publicly in its entirety for the first time.