President Donald Trump said he would not offer any extensions for the implementation of increased tariffs on many goods imported into the US, pledging that new rates would hit at the beginning of August.

Trump sent letters to 14 countries threatening them with new tariffs, and the White House said more countries may be included in the coming days.

The letters listed a range of tariffs. Goods entering the U.S. from Japan, South Korea, Malaysia, Kazakhstan, and Tunisia will be subject to a 25 percent levy. There will be a 30 percent levy on South African and Bosnian goods, while imports from Indonesia will be subject to a 32 percent rate.