The department said, “The Department of Commerce … announced the affirmative preliminary determinations of the countervailing duty (CVD) investigations of imports of fabricated structural steel (FSS) from China and Mexico and a negative preliminary determination in the CVD investigation of imports of FSS from Canada.”

The investigation revealed that Chinese and Mexican suppliers of fabricated structural steel had received subsidies at rates up to 177.43 percent and 74.01 percent, respectively, but subsidies received by Canadian exporters had been insignificant, the Commerce Department noted.

“Commerce will instruct U.S. Customs and Border Protection (CBP) to collect cash deposits from importers of FSS from China and Mexico based on these preliminary rates. At this time, cash deposits will not be collected on imports of FSS from Canada,” it said.

The investigation into FSS imports was launched on Feb. 4 after a petition of Chicago-based American Institute of Steel Construction.

Last year, the U.S. imported fabricated structural steel from Canada, China, and Mexico for an estimated $722.5 million, $897.5 million, and $622.4 million, respectively.

At the same time, the Mexican Economy Ministry stressed that these new measures were not related to earlier U.S. tariffs on steel and aluminum, from which Mexico and Canada were exempt in May after lengthy negotiations.

Previously, Trump threatened Mexico with tariffs of up to 25 percent, if the country did not take efforts to prevent illegal migration from the countries of Central America to the U.S.