Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

Israel struck Iran's state-run television station during a live broadcast, forcing a reporter to run off camera following an explosion.

Israel expanded its attacks on Iran on Monday, striking the headquarters of state television after ordering residents to leave part of Tehran, as the fiercest and deadliest confrontation in the history of the Israeli-Iranian conflict entered its fourth day.