US President Donald Trump warned Wednesday that more punishment was coming for countries buying Russian energy products after slapping a 25% tariff on India that is supposed to go into effect Thursday.

In an executive order, Trump says "I find that the Government of India is currently directly or indirectly importing Russian Federation oil" and due to those purchases, imports of Indian goods into the United States "shall be subject to an additional ... rate of duty of 25%."

Tariffs on Indian exports to the United States will surge to 50 percent by late August, as part of an effort by President Trump to pressure Russia into resolving its war in Ukraine.