Trump's special envoy to visit Russia ahead of Iran talks - Interfax

US President Donald Trump's special envoy Steve Witkoff will visit Moscow this week, Russian news agency Interfax reported, citing Kremlin foreign policy adviser Yury Ushakov.

Witkoff, who is the chief US negotiator in nuclear talks with Tehran, had visited Russia before attending the first round of talks held in Muscat on April 12.

Moscow and Tehran have deepened ties in recent years and the two heavily sanctioned powers have stepped up military cooperation amid Russia's full-scale invasion of Ukraine.