WASHINGTON (AP) - A painting believed to be by French impressionist Pierre-Auguste Renoir that a woman bought for $7 at a flea market may have been stolen from a museum six decades ago.

Related Story: Renoir Painting Found at West Virgina Flea Market

An auction house has put the sale of the painting on hold after a Washington Post reporter discovered documents in the Baltimore Museum of Art's library showing the painting was there from 1937 until 1949. Museum officials then found paperwork showing "Paysage Bords de Seine" was stolen in 1951.

According to Museum Director Doreen Bolger the FBI is investigating.

A Virginia woman bought the painting at a West Virginia flea market. She took it to the Potomack Co. auction house in Alexandria, Va. The auction had been set for Saturday.