United Nations officials called for an investigation into an Israeli military raid on a Gaza hospital during which patients died and the armed forces said they detained scores of Hamas militants and recovered a trove of weapons and other military equipment—some of which officials said was hidden inside an infant incubator and a resuscitation station for newborns.

Israeli forces withdrew from Kamal Adwan Hospital in northern Gaza on Saturday after entering the facility on Tuesday. The U.N. Human Rights Office said it was calling for an investigation of what transpired during the raid, citing allegations from medical staff that patients had died due to the conditions in the facility.