(Corrects to 'increasingly' from 'increasing' in first paragraph)
* TSX ends down 71.29 points, or 0.44 percent, at 16,247.95
* Nine of index's 10 main sectors fall
TORONTO, Jan 10 (Reuters) - Canada's main stock index fell on Wednesday, with the broad retreat accelerating in afternoon trade after Reuters reported that Canada is increasingly convinced the United States will withdraw from the North American Free Trade Agreement.
* The Toronto Stock Exchange's S&P/TSX composite index ended the day down 71.29 points, or 0.44 percent, at 16,247.95.
* Railways, pipelines and other trade-sensitive stocks including auto parts maker Magna International Inc were among the heaviest weights, after two government sources said U.S. President Donald Trump could announce he intends to pull out of the trade deal this month, when negotiators from the two countries and Mexico are due to resume talks.
* Canadian National Railway Co lost 2.7 percent to C$101.87 and rival Canadian Pacific Railway Ltd fell 3.1 percent to C$225.52, while TransCanada Corp shed 2.4 percent to C$59.57 and fellow pipeline company Enbridge Inc was down 2.1 percent at C$49.11. Magna fell 3.2 percent to C$71.44.
* Nine of the index's 10 main sectors ended lower, with gains for gold miners helping boost the materials group, which also includes base metals miners and fertilizer companies.
* Gold hit its highest in nearly four months as the U.S. dollar swooned after a report that Chinese officials had recommended slowing or halting purchases of U.S. Treasury securities.
* Media company Corus Entertainment Inc slumped 16.9 percent to C$9.17 after disappointing quarterly results that led an analyst at RBC Capital Markets to make a "major recalibration" of his forecast for Corus' television revenue.
* Miner Klondex Mines Ltd lost 11.5 percent to C$2.62 after announcing it would pull back on operations at its True North project in Manitoba.
* The energy group retreated 0.1 percent, although Crescent Point Energy Corp rose 4.5 percent to C$10.94 as analysts at two banks increased their price targets on the stock following the release of the company's 2018 budget.
* Oil prices hit fresh multi-year highs as OPEC-led production cuts and healthy demand helped balance the market, but analysts warned of possible overheating. (Reporting by Alastair Sharp; Editing by David Gregorio and James Dalgleish)