CALGARY — An $8-billion natural-gas-to-liquids fuel plant to be built in Alberta will be delayed for at least a year, South African energy company Sasol Ltd. signalled Monday.

The company had been expected to make a decision by the end of December on whether to proceed with a $200-million front-end engineering and design (FEED) study of the proposed project — if successful, construction could have started as early as 2015 and would be concluded in about four years.

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