A painting by Swiss artist Paul Klee that was stolen from a New York gallery in 1989 has been recovered after a Montreal gallery owner became suspicious and turned it over to U.S. authorities. Robert Landau turned the 1930 painting, Portrait in the Garden over to U.S. authorities after a Florida art dealer tried to sell it to him. It had been stolen from the Marlborough Gallery. "Once we found out it was stolen, we called Homeland Security in Washington," Landau told The Associated Press on Wednesday. "We don't deal in stolen art."

U.S. authorities then handed the painting over to the London-based Art Loss Register, which maintains a 350,000-item database of stolen artworks. Christopher Marinello, executive director of the Art Loss Register, praised Landau for his actions.

A spokeswoman for the Marlborough Gallery, Janis Gardner Cecil, said the $100,000 painting is now owned by Marlborough's insurer, Lloyd's of London, which will auction it.

Pat Reilly, a spokeswoman for U.S. Immigration and Customs Enforcement in Washington, told the AP that Landau was approached in December 2009 by a man who represented himself as an art dealer at an international art fair in Miami Beach. The man offered to sell the Klee to Landau, but Landau said he could not evaluate its authenticity on the spot. The man then sent the painting to Landau in Montreal with the understanding that Landau would buy it if he determined it was authentic. Instead, Reilly said, Landau discovered the painting had been stolen and turned it over to ICE agents. The investigation is ongoing.