Iran has delayed publicly naming a successor to Supreme Leader Ayatollah Ali Khamenei amid concerns that whoever is chosen could become the next target in the ongoing conflict with the United States and Israel.

According to Iranian officials, the hesitation stems from fears that identifying the next supreme leader could expose that individual to possible assassination attempts.

Ayatollah Khamenei was eliminated in American and Israeli strikes that also killed several senior military commanders and figures associated with Iran’s defense establishment. Despite those losses, the heads of Iran’s three branches of government—the presidency, judiciary, and parliament—remain alive.

Mojtaba Khamenei, the late leader’s 56-year-old son, has emerged as one of the leading candidates to replace his father. However, concerns about his safety intensified after reports surfaced suggesting he could become the next face of Iran’s leadership.

Iranian officials said that once Mojtaba Khamenei’s name began circulating publicly as the preferred successor, the United States indicated that he would not be considered an acceptable choice and could also be targeted.

President Donald Trump dismissed the possibility of Mojtaba Khamenei assuming power.

“They are wasting their time,” Trump told Axios on Thursday, adding that the former Supreme Leader’s son is “a lightweight” and an “unacceptable” choice.

“I have to be involved in the appointment, like with Delcy in Venezuela,” Trump said, referring to Delcy Rodríguez, who became interim leader after Washington captured the country’s leader, Nicolas Maduro.

Israel also signaled that any future Iranian leader would remain a potential military target. Defense Minister Yisroel Katz wrote in a social media post on Wednesday that whoever is chosen to replace Khamenei would be “an unequivocal target for elimination.”