John Ratcliffe met Russian intelligence officials in Moscow on August 25, according to the Kremlin. U.S. news organizations, citing people familiar with the trip, said he raised NATO security and Russia’s ties with Iran.

CIA Director John Ratcliffe traveled to Moscow on August 25 for talks with Russian intelligence officials, in a rare direct contact between Washington and Moscow as Russia’s war in Ukraine continues.

People familiar with the visit told CBS News and CNN that Ratcliffe warned Russia against attacking or otherwise testing NATO territory. The reports said he also raised Russia’s support for Iran. CBS reported that Ratcliffe warned of additional sanctions if the Strait of Hormuz did not reopen to shipping; CNN reported that he pressed Moscow to curb its economic and military support for Tehran.

The Kremlin confirmed that Ratcliffe met intelligence counterparts and said President Vladimir Putin did not take part. The CIA declined to comment on the purpose of the trip. On August 27, President Donald Trump said Putin would not attack NATO territory and characterized Ratcliffe’s contact with his Russian counterpart as routine, disputing that the director had been sent with a specific warning. Kremlin spokesperson Dmitry Peskov also dismissed reports describing the mission’s purpose.

The accounts come amid U.S. and European concern over Russian sabotage, cyber activity and other actions below the level of open warfare in Europe. Such activity has heightened attention on whether Moscow could seek to probe NATO’s political cohesion without launching a conventional attack.