BUZZ-Indian metal stocks fall as aluminium prices continue slide

** Metal stocks tumble, with the NSE Metal index dropping as much as 3.3 pct, its biggest intraday pct loss since March 23

** Aluminium prices continued to plunge on Tuesday after Washington gave U.S. customers of Russian producer United Company Rusal more time to close out their business with the company and comply with sanctions

** Hindalco Industries Ltd slides as much as 9.3 pct to 231.6 rupees - its biggest intraday pct loss since early November 2016

** Vedanta Ltd drops as much as 5.5 pct, while National Aluminium Co Ltd crashes nearly 11 pct to hit a one-week low

** The metal rallied to its highest since mid-2011 last week on fears that the global market could face shortages as a result of the U.S. sanctions

** Vedanta and Hindalco, among major drags on the NSE index, gained nearly 6 pct and 10 pct last week, while National Aluminium gained about 12 pct