Rubio, speaking to reporters about recent accusations that the Kremlin is conducting sabotage, drone incursions and other disruptive activities against European allies of Ukraine, said the danger of the war “metastasising” is a top concern for Washington.
He warned that the conflict could spread through a variety of hybrid tactics – from sabotage operations to accidental missteps such as a pilot straying into hostile airspace – potentially igniting active combat beyond the current front lines.
Rubio added that the United States would be “very open” to playing a constructive role in preventing such escalation, noting that while any involvement would not end the war, it could serve as a baseline for a broader diplomatic agreement.
The senator’s remarks come amid reports of increased hybrid attacks targeting NATO‑aligned states that support Kyiv, a pattern U.S. officials say is intended to undermine European solidarity with Ukraine and sow wider instability.
Rubio’s comments underscore Washington’s intent to monitor the evolving threat landscape closely and to consider diplomatic avenues that might curb the risk of the conflict expanding.