US President Donald Trump has said he will follow through with his threat to hit imports from Canada and Mexico with 25% border taxes, known as tariffs, on 1 February. But he added that a decision about whether this would include oil from those countries has not yet been made.

President Donald Trump affirmed on Thursday that imports from U.S. allies Mexico and Canada will be hit with a 25% tariff starting on Saturday. Speaking to the press from the Oval Office, Trump said that his administration will follow through in announcing tariffs on America’s neighboring countries for “a number of reasons”—chiefly among them being an alleged influx of migrants at the U.

President Donald Trump’s renewed pledges to slap 25% tariffs on imports from Canada and Mexico on Feb. 1 jolted foreign exchange markets late in the New York trading session, sending currencies from both countries plunging against the US dollar.