A Pablo Picasso sketch was stolen from a house near Mexico City.
The painting, a sketch of a man's face, was taken before dawn on Sunday from a house in the suburb of Tlalnepantla, said the official, who was not authorized to give his name. The owner told police the sketch was located in a portfolio that also contained a certificate of authentication.
He told police the sketch was worth US$650,000 (440,000 EUR).
The thieves also took a watch collection and a DVD burner.
Police had no leads in the case.
"We should use shock therapy to sober up the Americans. In this case, the Americans will speak about the need to resume dialogue. There is no other option"
The United States is concerned about the current crisis in the relations with Russia and suggests returning to reasonable policies to avoid a nuclear war