CIA Director John Ratcliffe made an unannounced trip to Moscow on Tuesday for meetings with Russian officials, according to U.S. media reports, marking one of the most sensitive known contacts between Washington and Moscow since Russia’s full-scale invasion of Ukraine.

CBS News and Axios first reported Ratcliffe’s visit, while DW and Reuters said the talks came after flight-tracking data showed a U.S. military transport plane arriving at Moscow’s Vnukovo Airport from Latvia before departing hours later. Neither the CIA nor the Kremlin offered details on the purpose of the trip, and Russian spokesman Dmitry Peskov said he had no information about the aircraft’s arrival.

The visit appears to be the first known trip by a CIA director to Russia since William Burns met with Russian President Vladimir Putin in November 2021, just months before Moscow launched its invasion of Ukraine.

The timing is striking. U.S.-brokered efforts to end the Russia-Ukraine war have slowed, while both Russia and Ukraine have intensified attacks beyond traditional battlefield targets. At the same time, Washington is increasing pressure on Iran, a close Russian partner, warning countries to cut business ties with Tehran or risk secondary sanctions.

Reuters reported that Russia and Iran maintain deep military, economic, and diplomatic ties, including Tehran’s supply of drones for Moscow’s war in Ukraine. Ukrainian officials have also accused Moscow of helping Iran with drone technology and intelligence support, allegations Russia denies.

The Wall Street Journal reported that Ratcliffe’s trip came as Washington is watching Russia’s military posture in Ukraine and broader attempts to test NATO’s resolve.

For now, the public record is limited: the CIA chief went to Moscow, the meetings were undisclosed, and both capitals are saying little. But in a season of war, sanctions, and shifting alliances, silence itself may speak loudly.