Israel has carried out a new wave of attacks on Iranian territory including on the cities of Tabriz and Shiraz and at the Natanz nuclear site, according to Iranian media on Friday.
The strikes follow wide-scale strikes overnight during which Israel attacked nuclear facilities and targeted top scientists and military commanders.
Israeli media reported that Iran retaliated with about 100 drones and that they were all shot down.
Iranian Foreign Minister Abbas Araghchi earlier described the Israeli attacks as a declaration of war, the state-run IRNA news agency reported.
Israel had crossed all red lines, Araghchi said according to the report. He called on the UN Security Council to deal with the incident immediately.