New US ambassador to Moscow Lynne Tracy on Monday met with a Russian deputy foreign minister, officials said.

Tracy arrived in Moscow last week, taking up her post amid high tensions over Russia’s military actions in Ukraine and US support for Ukraine including President Joe Biden’s recent decision to provide advanced battle tanks. Russia accuses Washington of engaging in a proxy war with Moscow.

Protesters held placards with anti-Washington messages, one of which read: “Your tanks are killing civilians.”

A US Embassy statement did not give details of what Tracy discussed with Deputy Foreign Minister Sergei Ryabkov.

It said she “begins her tenure in Moscow focused on maintaining dialogue between our capitals at a time of unprecedented tension. She will also be an advocate for the safety and fair treatment of all US citizens detained in Russia.” Paul Whelan, a corporate security director, and former Marine, was arrested in Russia four years ago and is serving a 16-year sentence after being convicted of espionage. The Biden administration considers him to be wrongfully detained but was unable to secure his release last year in a swap that freed American basketball star Brittney Griner in exchange for arms trader Viktor Bout.