KEY POINTS
  • Russia's Energy Minister Alexander Novak tells CNBC that sanctions on Iran are unlawful.
  • Tensions between the U.S. and Iran have escalated in recent weeks.
  • OPEC+ reached a deal to extend production cuts until March 2020.
Russia's Energy Minister Alexander Novak (L) and Saudi Arabia's Energy Minister Khalid al-Falih.

Russian Energy Minister Alexander Novak said Tuesday that Iran is not the cause of instability in the Persian Gulf and that sanctions against the country are "unlawful."

Iran's oil exports, the government's main source of revenue, have been hit hard. President Donald Trump reimposed heavy economic penalties last year in response to what his administration calls "malign activity" in the Middle East. In May, his administration ended the granting of waivers to the remaining importers of Iranian oil with the aim of slashing the country's crude exports to zero.