In response, the Lebanese army said it has redeployed soldiers from several recently established border positions on Tuesday following the Israeli army's "escalation", a Lebanese military source told AFP.

Thousands of Syrians have crossed from Lebanon into Syria to flee Israeli strikes over the past two days as Israel and the Iran-allied Lebanese militant group Hezbollah escalated their attacks against each other.

Trump added that he had ordered oil tanker insurance support, a move that marks an aggressive step to try to contain soaring energy prices.

Six U.S. troops have been killed in the widening war as of Tuesday evening. The U.S. and Israel are launching long-range strikes from bases and ships that are often hundreds of miles from their targets in Iran. The U.S. has so far minimized casualties by intercepting many Iranian strikes before they hit their targets.

Israeli strike hits Hezbollah-aligned media building in Beirut’s southern suburbs following an evacuation warning.

Iran struck the U.S. Embassy in Saudi Arabia with a drone Tuesday as it kept hitting targets around the region. Here's the latest on the conflict. (AP Photo)

As Israel intensifies its campaign against the Iranian-backed Hezbollah militia, Lebanon is now teetering on the brink of being fully sucked into the escalating US and Israeli war on Iran – a fate the fragile Lebanese government has been desperate to avoid.

Israel will step up its attacks on Hezbollah and Iran, says Prime Minister Benjamin Netanyahu during a visit to the Palmachim Airbase with Defense Minister Israel Katz and IDF Chief of Staff Lt. Gen. Eyal Zamir.