Iran no longer plans to engage in nuclear talks with the U.S. that were scheduled to take place in Oman on Sunday, Iranian leaders announced Friday after Israel’s deadly airstrikes targeting the Tehran’s nuclear facilities and military sites.

Oman News Agency and Iranian state media reported that the talks have been suspended indefinitely.

“Israel’s unilateral attack on Iran is illegal, unjustifiable and a grave threat to regional stability,” Oman Foreign Minister Badr Albusaidi posted on the social platform X after the attacks. “I condemn it and urge the global community to come together to reject Israeli aggression and support de-escalation and diplomacy with one voice.”

Iranian Supreme Leader Ayatollah Ali Khamenei, meanwhile, vowed retribution against its long-standing adversary Israel.

“With this crime, the Zionist regime has set itself up for a bitter and painful fate, and it will receive it,” he said in remarks released through state media.

President Trump and his administration have been working for weeks to reach a deal with Tehran on a nuclear agreement.

The meeting Sunday would have been the sixth round of high-level talks since April, as the U.S. and Iran try to hash out an agreement to replace the Joint Comprehensive Plan of Action (JCPA) that Trump withdrew the U.S. from during his first term.

Trump continued to urge Iran to enter the latest round of negotiations with serious intentions of striking a deal, despite Israel’s surprise attack.

“There has already been great death and destruction, but there is still time to make this slaughter, with the next already planned attacks being even more brutal, come to an end,” Trump posted on Truth Social. “Iran must make a deal, before there is nothing left, and save what was once known as the Iranian Empire.”

“No more death, no more destruction, JUST DO IT, BEFORE IT IS TOO LATE,” he added, noting that Iranian hardliners who had resisted an agreement “are all DEAD now, and it will only get worse.”

Trump has repeatedly stressed that a nuclear deal will not allow Iran to enrich uranium into a weapons-grade material, though the country has stood by its stated aim of “peaceful” enrichment that will be “mutually beneficial.”