Hegseth and Netanyahu "discussed the importance of advancing mutual security interests and priorities, especially in the face of persistent threats," the Pentagon said in a statement.

"The secretary stressed that the United States is fully committed, under President (Donald) Trump's leadership, to ensure that Israel has the capabilities it needs to defend itself," according to the statement, which did not specify why Hegseth spoke with Netanyahu instead of his direct counterpart Israel Katz.

Hegseth was sworn in on Saturday after being narrowly confirmed by the US Senate the night before.

He was one of Trump's most controversial cabinet nominees, facing allegations of alcohol abuse and sexual misconduct and concerns over his lack of experience leading a large organization.