Dec 17 (Reuters) - Canada's main index slipped on

Tuesday, dragged down by oil and mining stocks as commodity

prices fell ahead of the U.S. Federal Reserve's monetary policy

meeting on Wednesday.

At 09:32 a.m. ET, the Toronto Stock Exchange's S&P/TSX

composite index fell by 0.3% to 25,075.58 points.

(Reporting by Sruthi Shankar in Bengaluru)