He added: "As of now, there is a ceasefire in the energy sector in the war between Russia and Ukraine. Both parties have agreed to it. Do not breach it."
Trump's statements come as mutual attacks on energy facilities between Russia and Ukraine are escalating, in conjunction with US diplomatic moves to discuss halting attacks on energy infrastructure, especially as winter approaches.
For his part, Ukrainian President Volodymyr Zelenskyy said on Sunday that Kyiv is ready to halt its strikes on Russian oil refineries if Moscow stops its attacks on Ukraine's energy infrastructure, stressing the necessity of mutual cessation of attacks and including real guarantees.
Media reports said on Friday that Moscow is seeking to obtain a relaxation of US sanctions as part of any agreement to halt attacks on energy facilities, while trying to link the agreement with a ceasefire in the Black Sea.
Talks in Miami, on Friday, concluded with the participation of US, Ukrainian, and European officials, without announcing a breakthrough on a ceasefire, and the discussions included security guarantees, reconstruction, and the protection of energy facilities.