JERUSALEM — Gaza’s fragile ceasefire faced its first major test Sunday as Israeli forces launched a wave of deadly strikes, saying Hamas militants had killed two soldiers, and an Israeli security official said the transfer of aid into the territory was halted.

The military later said it resumed enforcing the ceasefire, and the official confirmed that aid deliveries would resume today. The official spoke on condition of anonymity because he’s not authorized to discuss the issue with the media.

A little over a week has passed since the start of the U.S.-proposed ceasefire aimed at ending two years of war. There was no immediate U.S. comment.

Health officials said at least 36 Palestinians were killed across Gaza, including children. Israel’s military said it struck dozens of Hamas targets after its troops came under fire.

A senior Egyptian official involved in the ceasefire negotiations said “round-the-clock” contacts were underway to de-escalate the situation. The official spoke on condition of anonymity because he wasn’t authorized to speak to reporters.

Israeli Prime Minister Benjamin Netanyahu directed the military to take “strong action” against any ceasefire violations but didn’t threaten to return to war.

Israel’s military said militants had fired at troops in areas of Rafah city that are Israeli-controlled according to agreed-upon ceasefire lines.

Hamas, which continued to accuse Israel of multiple ceasefire violations, said communication with its remaining units in Rafah had been cut off for months and “we are not responsible for any incidents occurring in those areas.”

Palestinians feared war would return to the famine-stricken territory where Israel cut off aid for over two months earlier this year after ending the previous ceasefire.

“It will be a nightmare,” said Mahmoud Hashim, a father of five from Gaza City, who appealed to U.S. President Donald Trump and other mediators to act.

Al-Awda hospital said it received 24 bodies from several Israeli strikes in the Nuseirat and Bureij camps in central Gaza.

An airstrike on a makeshift coffeehouse in Zawaida town in central Gaza killed at least six Palestinians, according to Gaza’s Health Ministry, part of the Hamas-run government. A strike in Beit Lahiya in the north killed two men, according to Shifa hospital.

Another strike hit a tent in the Muwasi area of Khan Younis in the south, killing at least four people, including a woman and two children, according to Nasser Hospital.

“Where is peace?” said Khadijeh abu-Nofal in Khan Younis, as hospital workers treated wounded children. She accompanied a young woman hurt by shrapnel.

Israel identified the remains of two hostages released by Hamas overnight: Ronen Engel, a father from Kibbutz Nir Oz, and Sonthaya Oakkharasri, a Thai agricultural worker from Kibbutz Be’eri.

Both were believed to have been killed during the Hamas-led attack on southern Israel on Oct. 7, 2023, which sparked the war. Engel’s wife, Karina, and two of his three children were kidnapped and released in a November 2023 ceasefire.

Hamas in the past week has handed over the remains of 12 hostages.

Its armed wing, the Qassam Brigades, said it found the body of another hostage and would return it Sunday “if circumstances in the field” allowed. It warned that any escalation by Israel would hamper search efforts.

Israel on Saturday pressed Hamas to fulfill its ceasefire role of returning the remains of all 28 deceased hostages, saying the Rafah border crossing between Gaza and Egypt would stay closed “until further notice.” It was the only crossing not controlled by Israel before the war.

Hamas says the war’s devastation and Israeli military control of certain areas have slowed the handover. Israel believes Hamas has access to more bodies than it has returned.

Israel has released 150 bodies of Palestinians back to Gaza, including 15 on Sunday, according to Gaza’s Health Ministry. Israel has neither identified the bodies nor said how they died. The ministry posts photos of bodies on its website to help families attempting to locate loved ones.