NEW YORK—Banksy says the first major exhibition of his work in New York, at Vanina Holasek Gallery, is unauthorized, Bloomberg reports. The artist, whose primary dealer is Lazarides Gallery in London, said on his Web site that the Chelsea show, featuring 62 paintings and prints sourced by London's Bankrobber Gallery, is "unlikely to be worth visiting." His Web site says the same of his current authorized show in Bethlehem.