US President Donald Trump said he had signed letters to 12 countries outlining the various tariff levels they would face on goods they export to the United States, with the “take it or leave it” offers to be sent out on Monday.

Axar.az reports, citing Reuters, Trump, speaking to reporters aboard Air Force One as he traveled to New Jersey, declined to name the countries involved, saying that would be made public on Monday.

Trump had earlier on Thursday told reporters that he expected a first batch of letters to go out on Friday, a national holiday in the United States, though the date has now shifted.

In a global trade war that has upended financial markets and set off a scramble among policymakers to guard their economies, Trump in April announced a 10 percent base tariff rate and additional amounts for most countries, some ranging as high as 50 percent.

However, all but the 10 percent base rate were subsequently suspended for 90 days to allow more time for negotiations to secure deals.

That period ends on July 9, although Trump early on Friday said the tariffs could be even higher – ranging up to 70 percent – with most set to go into effect August 1.

“I signed some letters and they’ll go out on Monday, probably twelve,” Trump said, when asked about his plans on the tariff front. “Different amounts of money, different amounts of tariffs.”