Live updates | Death toll rises to 12 with dozens injured in a strike on a crowded Gaza shelter

The death toll from a strike on a crowded shelter in Gaza has risen to 12, with over 75 wounded, according to Thomas White, a senior official with the United Nations agency for Palestinian refugees, known as UNRWA. The update Thursday said the attack the previous day involved two tank shells.

The agency did not directly blame Israel, which is the only party to the conflict that has tanks. The Israeli military said it has “currently ruled out” that the strike was carried out by its aircraft or artillery but was still investigating. It says the building might have been hit by a Hamas rocket.

The fighting in Khan Younis has isolated its two main hospitals, stranding hundreds of patients and thousands of displaced people inside. A third hospital was evacuated overnight, White said. Thousands of people rushed to escape farther south in recent days, crowding into shelters and tent camps near the border with Egypt.

The Health Ministry in Gaza says more than 25,700 people have been killed and another 63,000 wounded in the enclave since the Oct. 7 attack in southern Israel, when militants from Gaza killed around 1,200 people and took about 250 hostages.