CNN reports that a Detroit business was robbed in late April of 19 works of art, including an original silk screen that Andy Warhol used to print his 36 x 36 flower paintings:

The collection includes a 1960s silkscreen that Warhol used to make “Flowers”prints, according to the FBI.  The other pieces of art, including paintings and drawings, were done by Larry Rivers, Francesco Clemente, Philip Taaffe, Joseph Beuys and Peter Schuyff.

Warhol piece among high-priced art stolen in Detroit (CNN)