COMMODITIES-Gold leads selloff after U.S. shutdown; sugar jumps

By Barani Krishnan NEW YORK, Oct 1 (Reuters) - Gold, copper, crude oil and a number of other commodities fell sharply on Tuesday after the U.S. government's partial shutdown caused investors to sell and discouraged others from buying. Talk that a commodities fund was having to liquidate positions added to the pressure on gold. Gold sank 3 percent as some investors became frustrated at the market's inability to rally after the U.S. government shutdown. The safe-haven metal fell to its