Trump says damage to Iran's nuclear sites is 'far below ground level'

White House press secretary Karoline Leavitt, at the top of her briefing on Thursday, shared a message from President Trump regarding the Israel-Iran conflict.

"I know there has been a lot of speculation amongst all you in the media regarding the president's decision making and regarding whether or not the United States will be directly," Leavitt said.

"I have a message directly from the president: 'Based on the fact that there's a substantial chance of negotiations that may or may not take place with Iran in the near future, I will make my decision whether or not to go within the next two weeks,'" Leavitt said, adding that's a direct quote from Trump.

Israeli President Isaac Herzog told ABC News that Israel can win the war against Iran without the U.S., but said that removing Iran's nuclear threat serves the "free world," including the U.S.

Asked what he would say to President Donald Trump, Herzog said, "I trust his judgement and I'm sure he'll make the right decision."

Herzog said it has only been a week since the war began and suggested the threat of Iran will not go away "instantaneously."

"Victory looks like removing the Iranian nuclear threat," Herzog said.

"The ayatollah is the head of the snake. He's been leading this operation. He's been speaking about eliminating my nation, my people, my family for decades. So clearly, he is a major, major objective of dealing with. But, I cannot say that the ayatollah is a part of our war objectives," Herzog told ABC News.

-ABC News' Ian Pannell

At least 271 people were injured in strikes across Israel Thursday morning, according to Israeli emergency services.

No deaths were reported, but four of those injured are in serious condition, according to emergency services.

-ABC News' Jordana Miller

Russia warned that "military intervention" by the United States in Iran "would be an extremely dangerous step with truly unpredictable negative consequences," Maria Zakharova, a spokesperson for the Russian Foreign Ministry, said in a statement Thursday.

She also addressed Israeli strikes on Iranian nuclear facilities, singling out facilities where Russian specialists work.

"Russia calls on the Israeli leadership to immediately stop raids on nuclear facilities and sites that are under guarantees and are subject to IAEA verification activities," Zakharova said. "We are particularly concerned about the safety of the Bushehr nuclear power plant, which involves Russian specialists," Zakharova added.

"Today, the main thing is to prevent further escalation of violence, achieve a ceasefire and restore peace, which, in turn, will create the conditions for a return to negotiations. We are ready to contribute to this in every way and are making political and diplomatic efforts in this direction," Zakharova said.

-ABC News' Anna Sergeeva