The United States has warned Russia against interfering with sensitive American nuclear technology located at a nuclear power plant in Ukraine, according to a letter sent by the U.S. Department of Energy to Russia's state-owned nuclear energy company Rosatom last month.

The warning comes amid heightened tensions over nuclear facilities in the ongoing conflict. Russia has issued statements warning of risks in potential clashes between nuclear powers, while also accusing Ukraine of seeking to acquire nuclear weapons with assistance from the United Kingdom and France.

Separately, U.S. officials have reportedly cautioned Ukraine against targeting American interests during strikes on Russian energy infrastructure, according to diplomatic sources. The warnings reflect growing concerns about the potential for escalation involving nuclear facilities and technology.

The presence of U.S. nuclear technology at Ukrainian facilities adds another layer of complexity to the conflict, as both sides navigate the risks associated with nuclear infrastructure in an active war zone. The exact nature and location of the American technology referenced in the Energy Department's letter was not immediately disclosed.

The exchange of warnings and accusations between the involved parties highlights the delicate balance of nuclear security concerns as the conflict continues, with multiple nations working to prevent any incidents that could affect nuclear safety or lead to further escalation.