The United States is discussing ways to end hostilities with Iran, even as the Pentagon dispatches more troops.

Israel Katz, the defense minister, said he ordered troops to destroy more bridges and buildings in southern Lebanon, stoking worries that Israel was widening a military-controlled buffer zone there.

Accounts from Israeli officials and footage verified by The New York Times show that Iran has targeted Israel with the weapons. Experts say this has exposed civilians to indiscriminate attacks.

Israel said one of its F-35 fighter jets, known as an Adir, had downed another crewed plane over Tehran, the Iranian capital. Iran did not immediately comment.