"We agreed on the necessity of dismantling attack infrastructure along the border to ensure that Lebanese Hezbollah cannot conduct October 7-style attacks on Israel's northern communities," he said in a statement posted to social network X after speaking with Gallant.

Gallant had warned earlier that Israel's military action in Lebanon was not over despite an Israeli strike killing Hezbollah leader Hassan Nasrallah on Friday, dealing a devastating blow to the militant group.

Austin reiterated the position shared by the White House that a "diplomatic resolution is required" to ensure civilian safety "on both sides of the border."

"I reiterated the serious consequences for Iran in the event Iran chooses to launch a direct military attack against Israel," Austin said.

"The United States is well-postured to defend US personnel, partners, and allies in the face of threats from Iran and Iran-backed terrorist organizations and determined to prevent any actor from exploiting tensions or expanding the conflict."