Iran has officially supported Russia’s invasion of Ukraine, but new complications in talks to revive the 2015 nuclear deal signal differences between Moscow and Tehran.

The assassination of Iranian scientist Mohsen Fakhrizadeh will intensify debate in Tehran over whether to reengage in the nuclear deal with the Biden administration.

Iran’s new negotiating team signaled few compromises as it resumed talks over freezing its nuclear program amid reports of new uranium enrichment efforts.

Iran is facing international pressure over its nuclear program and assassinations of top officials. Meanwhile, its move to lift subsidies could stir public revolt.

The recent agreement between Israel and the United Arab Emirates reflects a profound shift in which Gulf Arab states opposed to Iran no longer consider relations with Israel off limits.