Mourners react near the bodies of Palestinians killed in Israeli strikes, at the European hospital in Khan Younis in the southern Gaza Strip

Mourners react near the bodies of Palestinians killed in Israeli strikes, at the European hospital in Khan Younis in the southern Gaza Strip on Friday.

CAIRO — Gaza’s largest functioning hospital was under siege on Friday in Israel’s war with Islamist group Hamas, leaving patients and doctors helpless in the chaos as warplanes struck Rafah, the last refuge for Palestinians in the enclave, officials said.

Israeli forces remained in Nasser Hospital in the town of Khan Younis after raiding it early Thursday. The Gaza Health Ministry said five intensive care patients died on Friday due to power outages and lack of oxygen supply caused by the attack.