The World Health Organization says it has lost contact with staff at northern Gaza’s last functioning hospital after the Israeli army said it was operating in the area, Paralel.Az reports citing Times of Israel.

Gaza’s Hamas-run health ministry says hundreds of patients and staff were detained at Kamal Adwan Hospital.

“Since this morning’s reports of a raid on Kamal Adwan Hospital in northern Gaza, we have lost touch with the personnel there,” WHO chief Tedros Adhanom Ghebreyesus says on X. “This development is deeply disturbing, given the number of patients being served and people sheltering there.”

Earlier the Israeli military said it was operating at the hospital amid “intelligence information on terrorists and terror infrastructure in the area.” In the weeks before the operation, the IDF says it enabled the evacuation of patients and staff from the hospital, while also ensuring that the medical center’s emergency systems continued to function.