US authorities have seized a long-lost painting by Spanish artist Pablo Picasso that was looted by Nazis during World War II.
The painting, called Femme en Blanc, is worth $US10 million.
The Federal Bureau of Investigation and US Marshals from Los Angeles seized the painting from the home of its owner in Chicago on October 21.
The raid followed a complaint that it was stolen property.
Prosecutors say the painting, also known as Femme Assise, was "arrested" on the grounds that it was stolen property that had been illegally shipped from one US state to another.
The work was painted by Picasso around 1922 and sold to a German Jew, Carlota Landsberg, in 1926 or 1927.
He sent it to a Paris dealer for safekeeping during World War II.
But in 1940, at the start of the German occupation of France, the painting was allegedly looted from the art dealer and not seen publicly again until late 2001, when it appeared at a Los Angeles exhibition.
A complaint filed in a Los Angeles court alleges that tracking by the London-based Art Loss Register reveals that the painting was sold to a Paris art dealer by a collector, who was investigated for benefiting from sales to the Nazis.
In 1975, the art dealer sold the painting to a Paris art gallery that in turn sold it to American buyers Marilynn Alsdorf and her late husband James, who lives in Chicago and who has owned it ever since.
After the painting was exhibited in Los Angeles, the gallery that showed the work was sent to Switzerland in an attempt to sell it on behalf of Marilynn Alsdorf.
But a routine investigation into its origins revealed it had been stolen by the Nazis.
Ms Alsdorf and the San Francisco area-based grandson of the painting's first owner, Landsberg, were informed of its history.