Smoke and flames filled the sky over Tehran as Israel struck oil and gas facilities in the Iranian capital and targeted more nuclear facilities during attacks that carried on into Sunday after starting two days earlier.

The strikes came after the Israeli military said it had carried out fresh strikes on Iran nuclear infrastructure sites.

Israel and Iran launched fresh attacks on each other late on Saturday, stoking fears of a wider conflict after Israel expanded its surprise campaign against its main rival with a strike on the world's biggest gas field.