Iran and global powers were to resume talks on Thursday to rescue the 2015 nuclear deal in an effort potentially complicated by Tehran's decision to ramp up uranium enrichment and what it called Israeli sabotage at a nuclear site.
Casting a shadow over the Vienna talks, Tehran on Tuesday announced its decision to enrich uranium at 60% purity, a big step closer to the 90% that is weapons-grade material, in response to an explosion at its key Natanz facility on Sunday that it blamed on Israel.