U.S. Secretary of State Marco Rubio steps off his plane upon arrival at the John C. Munro Hamilton International Airport in Hamilton, Ontario, November 11, 2025. Mandel Ngan/Pool via REUTERS

WASHINGTON, Dec 13 (Reuters) - Rwanda's actions in eastern Democratic Republic of Congo clearly violate the peace deal signed in Washington under U.S. President Donald Trump, Secretary of State Marco Rubio said on Saturday in the latest U.S. admonition to the East African country.

"Rwanda's actions in eastern DRC are a clear violation of the Washington Accords signed by President Trump, and the United States will take action to ensure promises made to the President are kept," Rubio said in an X post.

At the United Nations on Friday, the U.S. accused Rwanda of fueling instability and war as a Rwanda-backed advance of the M23 rebel group in eastern Democratic Republic of Congo threatens to derail U.S. efforts to broker peace in the region.

The leaders of the Democratic Republic of Congo and Rwanda signed a peace deal in Washington on December 4 even as fighting continued in their war-scarred region.

(Reporting by Doina Chiacu. Editing by Sergio Non and Mark Potter)