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People inspect the ruins of a building Sunday destroyed in Israeli strikes in Gaza City. Mahmud Hams / AFP - Getty Images

In Photos: Israel launches strikes on Gaza after surprise attack by Hamas militants

Rockets pummeled Palestinian targets as Israeli forces and Hamas militants exchanged intense gunfire in southern border towns.

After Prime Minister Benjamin Netanyahu declared “mighty vengeance” for Hamas’ surprise attack on his homeland, fierce fighting between Israeli forces and Hamas militants continued Sunday.

As battles raged on the streets of southern Israel, the country launched retaliation strikes that leveled buildings in Gaza. An exchange of fire at Israel’s border with Lebanon and a deadly shooting of Israeli tourists in Egypt on Sunday also fueled fears of broader violence.

Israel’s Security Cabinet officially approved a “war situation,” the prime minister’s office said Sunday on X, formerly known as Twitter. It came after Netanyahu warned of a “long and difficult” conflict as he concluded a meeting of Israel’s Security Cabinet late Saturday. 

At least 250 people were killed in Israel, according to the country’s Foreign Affairs Ministry, while the Palestinian Health Ministry said at least 370 people were killed in Gaza and hundreds more were injured.

Social media was also replete with videos of Hamas fighters taking civilians and soldiers hostage. Secretary of State Antony Blinken said Sunday that the U.S. was “actively working” to verify reports that several Americans may be among the dead, as well as reports that there could be some U.S. hostages.

Fighting between Israeli forces and the Palestinian militant group Hamas raged on October 8, with hundreds killed on both sides after a surprise attack on Israel prompted Prime Minister Benjamin Netanyahu to warn they were "embarking on a long and difficult war".
A Palestinian man stands early Sunday in front of the rubble of Gaza City's Al-Watan Tower, which was destroyed in Israeli airstrikes. Mohammed Abed / AFP - Getty Images
Fighting continued in southern Israel for a second day as Israeli Defence Forces sought to regain control of areas infiltrated yesterday by militants from the Gaza Strip.
Young men look at the remains of a destroyed mosque Sunday after an Israeli airstrike in Khan Younis, Gaza Strip. Ahmad Salem / Bloomberg via Getty Images
Israeli soldiers take position in the southern Israeli town of Ofakim on Sunday, Oct. 8, 2023. Hamas militants stormed over the border fence Saturday, killing hundreds of Israelis in surrounding communities. The burning car was used by the gunmen and set on fire by the residents.
Israeli soldiers take a position in the southern Israeli town of Ofakim on Sunday. The burning car was used by Hamas militants who stormed the border fence Saturday and was set on fire by residents. Ilan Assayag / AP
An Israeli soldier prays in front of a tank
An Israeli soldier prays in front of a tank on the outskirts of the northern town of Kiryat Shmona, near the border with Lebanon, on Sunday. Israel and Lebanon's Hezbollah said they traded cross-border fire Sunday. Jalaa Marey / AFP - Getty Images
After the attack launched by Hamas on Israel yesterday, which surprised them, Israeli Prime Minister Benjamin Netanyahu asked the Palestinians to leave Gaza, and warned that the army would turn Hamas positions into rubble.
Palestinians inspect damage to their homes Sunday in Gaza City.Getty Images
Fighting between Israeli forces and the Palestinian militant group Hamas raged on October 8, with hundreds killed on both sides after a surprise attack on Israel prompted Prime Minister Benjamin Netanyahu to warn they were "embarking on a long and difficult war".
Relatives carry the bodies at their funerals Sunday of children from the Abu Quta family who were killed in Israeli strikes in Rafah in the southern Gaza Strip.Said Khatib / AFP - Getty Images
Fighting between Israeli forces and the Palestinian militant group Hamas raged on October 8, with hundreds killed on both sides after a surprise attack on Israel prompted Prime Minister Benjamin Netanyahu to warn they were "embarking on a long and difficult war".
Women mourn during the funeral Sunday of members of the Abu Quta family killed in Israeli strikes in Rafah in the southern Gaza Strip.Said Khatib / AFP - Getty Images
At least 40 people have been killed in Israel during fighting with Palestinian militants on October 7, the Magen David Adom emergency medical services said in a statement.
Israel's Iron Dome defense missile system intercept rockets fired by Palestinian militants in the Gaza Strip over Sderot on Sunday.Jack Guez / AFP - Getty Images
Israel Hamas War
Relatives mourn over the body of Ahmad Awawda, 19, a Palestinian killed in clashes with Israeli troops near the city of Nablus on Saturday, at his funeral in the West Bank city of Jenin on Sunday.Majdi Mohammed / AP
Fighting continued in southern Israel for a second day as Israeli Defence Forces sought to regain control of areas infiltrated yesterday by militants from the Gaza Strip.
Israeli police check the occupants of a vehicle Sunday near Ashkelon, Israel.Kobi Wolf / Bloomberg via Getty Images
The militant Hamas rulers of the Gaza Strip carried out an unprecedented, multi-front attack on Israel at daybreak Saturday, firing thousands of rockets as dozens of Hamas fighters infiltrated the heavily fortified border in several locations by air, land, and sea, killing hundreds and taking captives. Palestinian health officials reported scores of deaths from Israeli airstrikes in Gaza.
An Israeli man carries a baby past the rubble of a destroyed building Sunday in Tel Aviv.Oded Balilty / AP
 Israel's prime minister of October 8 warned of a "long and difficult" war, as fighting with Hamas left hundreds killed on both sides after a surprise attack on Israel by the Palestinian militant group.
Israeli security forces and journalists take cover during a rocket attack from the Gaza Strip in the southern city of Sderot, Israel.Jack Guez / AFP - Getty Images
Smoke billows from a boat following Israeli strikes at the Gaza City port.
Smoke billows from a boat following Israeli strikes Sunday at the Gaza City port.Mohammed Salem / Reuters
Palestinians take shelter at schools due to Israeli bombardments in Gaza
Palestinian families take shelter Sunday at a U.N.-affiliated school in Gaza.Ashraf Amra / Anadolu Agency via Getty Images
Image: An Israeli soldier directs armored vehicles toward the southern border with the Gaza Strip in Sderot on Sunday.
An Israeli soldier directs armored vehicles toward the southern border with the Gaza Strip in Sderot on Sunday.Amir Levy / Getty Images
Image: A member of the civil defense crew searches a damaged house in Khan Younis, near the southern Gaza Strip, on Sunday.
A member of the civil defense crew searches a damaged house in Khan Younis, near the southern Gaza Strip, on Sunday.Yousef Masoud / AP
Image: Residents run to take shelter as airstrike sirens sound in Ashkelon, Israel, on Sunday.
Residents run to take shelter as airstrike sirens sound in Ashkelon, Israel, on Sunday.Ohad Zwigenberg / AP