MUNICH (AP) — President Donald Trump’s national security adviser has told an international audience that the evidence of Russian meddling in the 2016 American election is beyond dispute.

H.R. McMaster was answering a question from a Russian delegate, shortly after Russian Foreign Minister Sergey Lavrov left the same stage at the Munich Security Conference on Saturday.

Referring to the indictment of 13 Russians announced Friday, McMaster says “with the FBI indictment, the evidence is now incontrovertible” of Russia cyber-meddling.

He also scoffed at any move to work with Russia on cybersecurity, saying “we would love to have a cyber dialogue when Russia is sincere about curtailing its sophisticated form of espionage.”

Lavrov, just moments earlier, had dismissed the indictments as “just blabber” through an interpreter.