The U.S. Navy is moving warships and aircraft closer to Israel in the aftermath of an unprecedented assault on the country from Hamas terrorists, a U.S. military official tells Fox News.

President Biden has aggressively affirmed Israel’s right to defend itself in the wake of Saturday’s surprise attack, which has so far killed at least 600 Israelis and wounded at least 2,000 more.

The Pentagon has not clarified whether it would use military force to assist Israel in the conflict. Israel formally declared war on Hamas on Sunday, its first such declaration since 1973.