A group that includes three children of Norman Rockwell is suing the Berkshire Museum in Massachusetts over a controversial planned sale of two works by the famed artist, the New York Times reported.

Papers filed with a Massachusetts judge on Friday state that the group seeks to stop the museum from offering two paintings by Rockwell, including "Shuffleton's Barbershop," considered one of his finest works, that is expected to bring around $30 million at Sotheby's next month. "Shaftsbury Blacksmith Shop" could bring around $10 million.

The museum planned to sell the Rockwells and other artworks to fund a "New Vision." The group opposed to the sale argue that the two paintings were gifts from the artist to be enjoyed by people from the Berkshire region, not assets to be sold to cover budget shortfalls. Selling the paintings would be a breach of fiduciary duties, the group states.