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(CNN) – In 1990, two men disguised as police officers tied up the security guards at Boston's Isabella Stewart Gardner Museum, and boosted 13 masterpieces by the likes of Rembrandt and Manet.
All told, the works were worth half a billion dollars.
Now, 24 years later, the FBI says the paintings have been spotted by what they call "credible sources." The persons of interest in the case are linked to organized crime.
But two of three possible suspects are reportedly dead.
"If (these paintings) came back to the family of art, I think we would all be thrilled. Some of these paintings are irreplaceable," says Jerry Saltz, senior art critic for New York Magazine.
One of the stolen pieces was a Johannes Vermeer painting – there are only 35 Vermeer paintings on earth, says Saltz.
"I do not care what happens to the people that took (them), we just need this work back," said Saltz.
For more of our interview with Jerry Saltz, check out the video above.