Ukraine imposed sanctions on three Chinese companies on Friday claiming they were involved in production of advanced Iskander missiles, a day after President Volodymyr Zelenskiy alleged that China had been supplying weapons to Russia.

China said it would take “countermeasures” against countries that take trade deals with the United States that it deems to be detrimental to its interests. The Trump administration imposed a 145% tariff on China which countered with a 125% tariff on imports from the U.

“China firmly opposes any party reaching a deal at the expense of China’s interests,” China’s Commerce Ministry said in a statement. “If this happens, China will never accept it and will resolutely take countermeasures in a reciprocal manner. China is determined and capable of safeguarding its own rights and interests.”