The storming by Israeli troops of southern Gaza’s main hospital brought chaos to hundreds of staff and patients inside, as health officials Friday said four people in intensive care died after their oxygen cut off. Troops were searching the facility, where the military said it believes the remains of hostages abducted by Hamas might be located.

The raid came after troops had besieged Nasser Hospital in the southern city of Khan Younis for nearly a week, with staff, patients and others inside struggling under heavy fire and dwindling supplies, including food and water. Hours before troops seized the hospital Thursday, Israeli fire killed a patient and wounded six others inside the complex, staff said.