Oil prices, which have been pressured by concerns about excess supply, tumbled more than 5 percent and reached their lowest level since early 2009.

The benchmark TSX neared its weakest level in nearly four weeks, with five of the 10 major sectors on the index trading in the red. Shares in the energy sector are down about 41 percent since last June.

"There's no let-up in the selloff. The selling has been relentless," said Elvis Picardo, strategist and vice president of research at Global Securities in Vancouver.

"There is a growing view that perhaps investors are underestimating the impact of the crude oil collapse on the Canadian economy," he added.

The Toronto Stock Exchange's S&P/TSX composite index <.GSPTSE> settled 119.91 points lower, falling 0.83 percent, to 14,265.01.

Shares of energy producers gave back 4.6 percent, with Canadian Natural Resources Ltd (>> Canadian Natural Resources Limited) shedding 4.1 percent to C$31.81 and Suncor Energy Inc (>> Suncor Energy Inc.) losing 3.6 percent to C$34.32.

Financials, the index's most heavily-weighted sector, fell 0.9 percent. Toronto Dominion Bank (>> Toronto-Dominion Bank) declined 1 percent to C$52.09 and Bank of Montreal (>> Bank of Montreal) was down 1 percent at C$77.52.

The gold-mining sector jumped with the price of bullion. [GOL/] Goldcorp Inc (>> Goldcorp Inc.) advanced 4.4 percent to C$25.72.

In corporate news, Linamar Corp (>> Linamar Corporation) will add up to 1,200 jobs at a facility in Guelph, Ontario, with 10 percent of the new investment paid by the Canadian government, the government said. Shares of the autoparts maker edged up 0.3 percent, to C$69.

(Editing by Meredith Mazzilli, G Crosse)

By John Tilak