BAGHDAD -Iran-aligned Iraqi armed group Kataib Hezbollah warned on Sunday it would resume attacks on U.S. troops in the region if the United States intervenes in the conflict between Israel and Iran.

Israel and Iran have opened a new chapter in their long history of conflict when Israel launched a major attack with strikes early Friday on Tehran.

"Hezbollah is committed to the ceasefire agreement, even though Israel has not respected this commitment over the past period," the spokesperson said. "It continues to kill, assassinate, and attack areas, including entering border villages and remaining at the five points."

The conflict, the most intense fighting between the two countries in decades, has been met in the United States with feelings of “frustration and helplessness,” as well as heartbreak.

From a bomb shelter at Tel Aviv, our correspondent reports of the wail of sirens signaling incoming ballistic missiles the length of Israel Sunday evening.

Israeli Prime Minister Benjamin Netanyahu was coy about whether the ultimate goal of the preemptive strikes on Iran is regime change, but made clear that such a powershift would be a welcome

Israel is reducing its military presence in Gaza to reinforce its northern and eastern borders amid concerns over regional infiltration.

President Donald Trump says if Iran attacks the US in any way, it would face the might of America's military "at levels never seen before". Meanwhile, Israel says sirens were activated overnight due to strikes from both Iran and Yemen,

President Trump rejected rightwing pundit Tucker Carlson’s withering criticism that he is ditching America First principles through his support for Israel amid its military campaign against