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.

Israel launched a wave of unprecedented strikes on Iran shortly before sunrise Friday morning, hitting key sites in the nation’s nuclear program.

The two sides were scheduled to meet for a sixth round of negotiations on Sunday. Oman, which was set to host the talks, said on Saturday that this round had been canceled.

"Iran must make a deal, before there is nothing left, and save what was once known as the Iranian Empire," President Donald Trump said Friday. The president has been steadfast in pursuing a new deal over Iran's nuclear program since returning to the White House earlier this year.

Iran has warned it will ramp up its nuclear activities after the United Nations nuclear watchdog’s 35-member board of governors adopted a resolution Thursday declaring it in breach of its non-proliferation obligations.

The decision comes as officials say they believe that Israel is preparing to launch a military attack on Iran. Tehran condemned the vote.

Anger is mixed with worry as Iranians in the capital of Tehran woke up Saturday to images of their country’s retaliatory attacks on Israel