Russia carried out its largest air strike on Ukraine's energy system since its invasion in February 2022, damaging power units at a dam and causing blackouts for more than a million people
The United States early this month re-imposed sanctions against Iran's oil exports to punish Tehran for its involvement in several Middle Eastern conflicts and curb its nuclear programmes.
But fearing a price spike, Washington granted a sanctions waiver to eight of the biggest buyers of Iran's oil, including India.