The IDF struck several targets at a petrochemical plant near Iran's southwestern city of Mahshahr, the military confirmed on Monday morning, following a second wave of Iranian missile attacks on Israel.
Parts of the site were damaged in the Israeli strike, and the area is being evacuated, Iran's Fars News Agency reported on Monday.
The strikes come after sources told The Jerusalem Post on Sunday that Israeli officials were still deciding when and how hard to hit Iran, noting that a significant Israeli response to Tehran's ceasefire breach was expected.
Iran's Islamic Revolutionary Guard Corps (IRGC) claimed that the strikes were carried out using air-launched ballistic missiles, according to Iranian IRNA state media.
Iran had threatened to attack Israel following an earlier IDF strike on Beirut, which itself was retaliation for continued Hezbollah ceasefire breaches.
Earlier on Monday, a United States official told Axios that he did not expect an imminent Israeli retaliation against Iran.
"I don't think anything is imminent in terms of an Israeli strike," he said.
Trump asked PM to hold off on strike
On Sunday, US President Donald Trump asked Prime Minister Benjamin Netanyahu to avoid striking Iran, N12 news reported.
"Israel has responded enough, no need for more," Trump additionally told KAN News.
Trump told Axios later on Sunday that the US is "very close to a final deal with Iran."
"I don't want it to blow up because of what is happening now," he said.
"If Netanyahu strikes them back, it's just gonna keep going like the last 47 years, or last 3,000 years," added Trump, noting that the Iranian attack on Israel "didn't hurt anybody."
Reuters contributed to this report.