US President Donald Trump will implement tariffs on Washington's three largest trading partners, namely Canada, Mexico and China, on Saturday, according to the White House.

Trump has reiterated his plans for 25% tariffs on Canada and Mexico, saying they have failed to crack down on illegal migrants crossing the border into the United States and stamp out the flow of fentanyl.

He also warned of a 10% duty on Chinese goods, also highlighting the spread of fentanyl into the US.

"The February 1 deadline that President Trump put into place at a statement several weeks ago continues," White House spokeswoman Karoline Leavitt told reporters on Friday.

"Both Canada and Mexico have allowed an unprecedented invasion of illegal fentanyl that is killing American citizens, and also immigrants into our country," she added.

Trump says EU tariffs will be next

Later on Friday, Trump told reporters in the Oval Office that "nothing" can be done by Canada, Mexico and China to forestall tariffs and vowed to tariff items such as chips, oil and gas.

Trump added that the tariffs on oil and gas are likely to come into effect by February 18.

Trump also warned the European Union that he was going to impose tariffs on the bloc in future too.

"Am I going to impose tariffs on the European Union? You want the truthful answer or shall I give you a political answer? Absolutely. The European Union has treated us so terribly," Trump told reporters.

jsi/dj,zc (AP, AFP, Reuters, dpa)