Fighting is ongoing after Hamas launched an attack on Israel on Oct. 7.
At least 1,400 people have died and 3,400 others have been injured in Israel after the militant group Hamas launched an unprecedented incursion from air, land and sea on Oct. 7, Israeli authorities said.
In Gaza, 3,000 people have been killed and another 12,500 were injured, according to the Palestinian Ministry of Health.
Tensions are high with the prospect of ground war and evacuation orders for Gaza after the Israel Defense Forces called for "all residents of Gaza City to evacuate their homes" and "move south for their protection" early Friday, saying residents should move "and settle in the area south of the Gaza River." The announcement was made, according to the IDF, because it plans to "operate significantly in Gaza City in the coming days" and wanted "to avoid harming civilians."
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On the morning of Oct. 7, sirens echoed across Israel as Hamas terrorists began a full-fledged surprise attack from the air, sea and ground. Hundreds of armed Hamas fighters stormed into Israel from Gaza, charging into cities and gunning down citizens.
Israeli forces responded by sending wave after wave of bombs into Gaza, killing thousands, trapping civilians and raising fears of a wider conflict in the Middle East.
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Israeli Defense Forces attacked the Gaza Strip early Monday morning local time, the IDF said in a series of posts on X, the platform formerly known as Twitter.
The IDF attacked a building where it said Hamas operatives were and several operational headquarters of the organization, the IDF said in the posts.
-ABC News’ Ellie Kaufman
An emergency meeting of the United Nations Security Council failed to condemn the Hamas attacks on Israel Sunday evening.
Deputy U.S. Ambassador the U.N. Robert Wood said the situation was "still fluid" and "very dangerous."
"What is important now is that the international community needs to show its solidarity with Israel. We have Israel's back fully as the United States, and the condemnation of Hamas needs to continue until they end this violent terrorist activity against the Israeli people," Wood said after the meeting.
-ABC News' Ellie Kaufman
At least four American citizens were killed in the attacks in Israel over the weekend, senior administration officials told top House lawmakers on a call Sunday evening, according to multiple sources familiar with the matter.
That figure could rise in the coming days, the Biden administration officials told Congress. The administration is also still investigating unconfirmed reports of American citizens being taken hostage by Hamas.
Participants on the call included senior members of the relevant House committees and party leaders — including Rep. Patrick McHenry, R-North Carolina, the temporary House speaker, two sources told ABC News.
As previously reported, Senate leaders will receive a similar briefing tonight.
--ABC News' Ben Siegel
Senate leadership, chairs and ranking members of relevant committees will receive an unclassified briefing on the situation in Israel Sunday night at 9 p.m. ET, a Senate source told ABC News.
The chairs and ranking members from the Senate Committee on Foreign Relations, the Senate Select Committee on Intelligence and the Senate Committee on Armed Services are among those who will be briefed.
