WASHINGTON, Jan 19: The United States said on Friday it would extend an investigation into Canadian wheat sales from January 22, until February 15, to study a “tremendous” response to its request for comments.

Extending the investigation will enable us to thoroughly review and analyze all the information received, US Trade Representative Robert Zoellick said in a statement.

The United States launched an investigation in October last year, based on a petition by the North Dakota Wheat Commission alleging unfair marketing practices.

About 10 per cent of Canadian wheat exports, or roughly 2.5 million tons, go to the US.—AFP