The FBI said Monday that it believes it knows who stole paintings valued at up to $500 million from Boston's Isabella Stewart Gardner Museum in 1990.
The heist involved 13 works, including including masterpieces by Rembrandt, Vermeer, Degas and Manet.
"The FBI believes with a high degree of confidence that in the years after the theft, the art was transported to Connecticut and the Philadelphia region, and some of the art was taken to Philadelphia, where it was offered for sale by those responsible for the theft." said Richard DesLauriers, special agent in charge in Boston.
He identified the thieves as members of a criminal organization with a base in the Mid-Atlantic states and New England.
The FBI, which has offered a $5 million reward in the case, has set up a new website to seek information from the public to help locate the missing works.
DesLauriers says the statute of limitations has passed for the crime of art theft and authorities are focused on recovering the art.