Gold and silver advanced on Tuesday trading session after demand for the metals as haven increased amid rising concerns that recovery of the world's largest economy may be endangered after the U.S. government partially closed today. Bullion for delivery in October added 0.6% to $1,337.49 an ounce and was traded at $1,335.18 as of 3:09 p.m. Singapore time, while silver gained 1.2% to $21.9515 an ounce.