The Associated Press / Displaced Palestinians, carrying their belongings, wood and other items, move between southern and northern Gaza along a beach road away from the areas where the Israeli army is operating after Israel’s renewed offensive in the Gaza Strip, in the outskirts of Gaza City on Friday.

JERUSALEM — Israeli forces advanced deeper into the Gaza Strip on Friday and blew up the only specialized cancer hospital in the war-torn territory, as Israeli leaders vowed to capture more land until Hamas releases its remaining hostages.

The hospital was located in the Netzarim Corridor, which splits Gaza in two and was controlled by Israeli troops for most of the 17-month-long war. Israel moved to retake the corridor this week shortly after breaking the ceasefire with Hamas. The truce delivered relative calm to Gaza since late January and facilitated the release of more than two dozen hostages.

The Israeli military said it struck the Turkish-Palestinian Friendship Hospital, which was inaccessible to doctors and patients during the war, because Hamas militants were operating in the site. Turkey, which helped build and fund the hospital, said Israeli troops at one point used it as a base.

Dr. Zaki Al-Zaqzouq, head of the hospital’s oncology department, said a medical team visited the facility during the ceasefire and found that, while it had suffered damage, some facilities remained in good condition.

“I cannot fathom what could be gained from bombing a hospital that served as a lifeline for so many patients,” he said in a statement issued by the aid group Medical Aid for Palestinians.

The Turkish Foreign Ministry condemned the hospital’s destruction and accused Israel of deliberately “rendering Gaza uninhabitable and forcibly displacing the Palestinian people.”

Hospitals can lose their protected status under international law if they are used for military purposes, but any operations against them must be proportional. Human rights groups and U.N.-backed experts have accused Israel of systematically destroying Gaza’s health care system.

Israel warns it will escalate operations

Israel’s renewed military offensive in the Gaza Strip threatens to be even deadlier and more destructive than the last, as it pursues wider aims with far fewer constraints.

Defense Minister Israel Katz said Friday that his country would carry out operations in Gaza “with increasing intensity” until Hamas frees the 59 hostages it holds — 24 of whom are believed alive.

“The more Hamas continues its refusal to release the kidnapped, the more territory it will lose to Israel,” Katz said.

The Israeli military said Friday its forces were planning fresh assaults into three neighborhoods west of Gaza City, and issued warnings on social media for Palestinians to evacuate the areas.

The warnings came shortly after the military said it intercepted two rockets fired from northern Gaza that set off sirens in the Israeli coastal city of Ashkelon. Hamas had also fired three rockets the previous day in its first attack since Israel ended the ceasefire.

A long-range missile fired by Yemen’s Houthi rebels set off air raid sirens over Jerusalem and central Israel for the fourth day in a row Friday, with the military saying it was intercepted.

Israel advances in Gaza’s north, south

Israeli troops had moved Thursday toward the northern town of Beit Lahiya and the southern border city of Rafah, and resumed blocking Palestinians from entering northern Gaza, including Gaza City.

Displaced Palestinians fled northern Gaza along a coastal road Friday carrying their belongings, firewood and other items on horse-drawn carts.

A strike east of Gaza City on Friday killed a couple and their two children, plus two additional children who weren’t related to them, according to witnesses and a local hospital. The Israeli army said it struck a militant in a Gaza City building and took steps to minimize civilian harm. It was not immediately clear if the army was referring to the same strike.