JERUSALEM (AP) — Israel’s military scoured the country’s south for Hamas fighters, guarded breaches in its border fence and pounded the Gaza Strip from the air on Monday as it vowed to lay total siege to the impoverished, Hamas-ruled territory in the wake of an unprecedented weekend incursion.

As Israel hit more than 1,000 targets in Gaza and its tanks and drones guarded openings in the border fence to prevent more infiltrations, Palestinian militants continued firing barrages of rockets, setting off air raid sirens in Jerusalem and Tel Aviv.

Earlier, Hamas spokesman Abdel-Latif al-Qanoua told The Associated Press over the phone that the group’s fighters continued to battle outside Gaza and had captured more Israelis as recently as Monday morning.

After breaking through Israeli barriers with explosives at daybreak Saturday, Hamas gunmen rampaged for hours, gunning down civilians and snatching people in towns, along highways and at a techno music festival attended by thousands in the desert.

In the city of Rafah in southern Gaza, an Israeli airstrike early Monday killed 19 people, including women and children, said Talat Barhoum, a doctor at the local Al-Najjar Hospital.

Associated Press writers Isabel DeBre and Julia Frankel in Jerusalem; Wafaa Shurafa in Gaza City; Tia Goldenberg in Tel Aviv, Israel; Bassem Mroue in Beirut; Samy Magdy in Cairo; and Amir Vahdat in Tehran, Iran, contributed to this report.

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