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

"The full strength and might of the U.S. Armed Forces will come down on you at levels never seen before," Trump warned.

Israel has issued a stern warning to Iran, threatening to strike civilian targets in Tehran in retaliation for Iran's missile attacks.

Israel faced retaliation from Iran after launching missiles against Tehran's leadership and energy infrastructure as part of "Operation Rising Lion" this weekend. Iran's military responded with a wave of missile strikes against Israel,