President Trump is considering joining Israel's multiday effort to strike Iranian nuclear facilities, multiple sources familiar with the matter told CBS News. One possible target is Fordo, a subterranean uranium enrichment site that'sbelieved to be key to Iran's nuclear program, according to the sources, which include a senior intelligence official and a Department of Defense official. Fordo is buried almost 300 feet beneath a mountain and protected by significant air defenses and is believed to be the most likely location for a hypothetical nuclear weapons "breakout" program. Nuclear non-proliferation experts say that it's at Fordo where Iran has aimed to enrich uranium for weapons purposes and expand its stockpile of enriched uranium. There is not full agreement among Mr. Trump's closest advisers on how to proceed. The issue was expected to be discussed in a meeting with Mr. Trump's national security team in the White House Situation Room earlier Tuesday. Attendees included Vice President JD Vance, Secretary of State Marco Rubio, Defense Secretary Pete Hegseth, Director of National Intelligence Tulsi Gabbard, special envoy to the Middle East Steve Witkoff and CIA Director John Ratcliffe. Shortly after launching strikes on Iran early Friday morning, Israelallegedthe country is making swift progress toward building nuclear weapons. But earlier this year, a U.S. intelligence assessmentsaidIran is not building nuclear weapons, but pressure has likely built on the regime to restart its nuclear program. Iran hasdramatically increasedits stockpile of near-weapons-grade uranium in recent months, according to the International Atomic Energy Agency. The Iranian government has long insisted its nuclear program is intended for peaceful purposes. The Trump administration has saidpubliclyandprivatelythat the U.S. is not involved in Israel's offensive, though CBS News haspreviously reportedthe U.S. has helped Israel intercept missiles fired by Iran in retaliation. Mr. Trump hasn't ruled out getting involved, and a series of posts on Truth Social earlier Tuesday have raised questions about the U.S.'s level of involvement in the conflict. The president posted on Tuesday, "We now have complete and total control of the skies over Iran." He also wrote that the U.S knows the whereabouts of Iran's supreme leader, Ayatollah Ali Khamenei, but added, "We are not going to take him out (kill!), at least not for now." CBS News previously reported that Mr. Trumpopposed an Israeli plantokill Khamenei. Most recently, Mr. Trumpposted, "UNCONDITIONAL SURRENDER!" Teen questioned after family's quadruple murder Trump supporters divided on potential U.S. involvement in Israel-Iran conflict Kraft Heinz eliminating all synthetic food dyes by 2027