The Biden administration slapped fresh sanctions on Iran’s petroleum industry on Friday in retaliation for Tehran’s massive missile attack on Israel last week. The Treasury Department announced that the sanctions would target “the shadow fleet” of tankers and illicit operators that help transport the Iranian regime’s petroleum exports in violation of existing sanctions.

Iran has informed the United States that it will retaliate against any new attack by Israel, a source in Tehran told CNN. Iran’s government has also been engaging in urgent diplomatic efforts with countries in the Middle East to gauge whether it can reduce the scale of Israel’s response to its missile attack earlier this month and — if that fails — help protect the capital,