US Secretary of State Marco Rubio stated on Sunday that Washington is “not disputing” a report by five European countries accusing Russia of fatally poisoning imprisoned opposition leader Alexei Navalny with a rare frog toxin, describing the findings as “troubling.” The remarks come amid ongoing tensions between the US and Russia, even as Washington has engaged in contacts with Moscow on improving bilateral ties.

The report, led by the United Kingdom and four allies, concluded that Russia poisoned Navalny using a toxin derived from a poison dart frog. This European initiative detailed the circumstances surrounding the opposition figure's fatal poisoning, highlighting what the authors deemed a deliberate act by Russian authorities.

Rubio's comments were made during discussions on international relations, where he emphasized the US position of neither confirming nor challenging the European assessment. “We are not disputing” the report, Rubio said, underscoring Washington's careful stance on the matter.

The United States opted not to join the joint statement issued by the five European countries. Rubio explained that the US administration refrained from signing on because the effort was a European-led initiative, allowing the allies to take the lead in articulating their conclusions.

Navalny, a prominent critic of the Russian government, was described in the report as an imprisoned opposition leader at the time of the poisoning. The use of a toxin from a poison dart frog was cited as evidence of the method employed in what the report portrayed as a targeted attack.

Despite the gravity of the report's allegations, Rubio noted that the US has maintained contacts with Russian officials focused on improving ties. This diplomatic engagement continues even as the Navalny case draws international scrutiny from European partners.

The European report represents a unified stance from the UK and its four allies, marking a significant accusation against Russia over Navalny's fate. Rubio's acknowledgment without dispute signals alignment in concerns, though the US maintains its independent approach to such matters.