Wall St ends lower

U.S. shares closed lower on reports that European Central Bank could stop monetary operations with some Greek banks.
Dow Jones Industrial Average fell 33.45 points, or 0.26 per cent to 12,598.55
S&P 500 dropped 5.86 points, or 0.44 per cent to 1,324.80.
Among the key S&P sectors, financials led the laggards, while consumer staples managed slight gain.
Nasdaq composite slipped 19.72 points, or 0.68 per cent to 2,874.04.