The issue has been an obstacle to progress in wider talks to revive Iran’s 2015 nuclear deal with major powers, meant to curb its disputed uranium enrichment program in return for lifting sanctions imposed by Washington after exiting the pact in 2018.Iran has brutally cracked down on street protests, Western states say Russia has used Iranian drones in its war in Ukraine, and Tehran has accelerated its nuclear program, all of which raise the political price to giving Iran sanctions relief.Iran has acknowledged that it supplied Moscow with drones but said they were sent before Russia’s invasion of Ukraine.“We hope that this matter will be resolved during the visit of the (UN nuclear) agency’s delegation to Tehran,” he said.The IAEA said last year Iran had failed to explain traces of uranium found at several undeclared sites, which the agency said affected its ability to verify whether Iran’s nuclear activity was part of a peaceful energy project, as Tehran has always maintained."