US Congress representatives are threatening businesses, demanding that they refuse to participate in agreements to supply Russian diesel fuel to the American market, Axios reported.

According to the news outlet, Democratic members of the Senate and House of Representatives, along with one Republican who joined them, sent a letter to that effect to major US banks, as well as to several of the country’s ports.

The document stated that legal action could be taken in the US against the Russian-American diesel agreements, noting that the deal “raises significant national security concerns.” The lawmakers pointed out that the agreements may also become the subject of “congressional oversight,” clearly adopting an anti-Russian stance in the letter.