Israeli troops stormed one of the last hospitals operating in northern Gaza on Friday, igniting fires and forcing many staff and patients outside to strip in winter weather, the territory´s health ministry said. Kamal Adwan Hospital has been hit multiple times over the past three months by Israeli troops waging an offensive against Hamas fighters in surrounding neighborhoods, according to staff. The ministry said a strike on the hospital a day earlier killed five medical staff. Israel’s military said it was conducting operations against Hamas infrastructure and militants in the area of the hospital, without details. It repeated claims that Hamas fighters operate inside Kamal Adwan but provided no evidence. Hospital officials have denied that. The Health Ministry said troops forced medical personnel and patients to assemble in the yard and remove their clothes. Some were led to an unknown location, while some patients were sent to the nearby Indonesian Hospital, which was knocked out of operation after an Israel raid this week. Israeli troops during raids frequently carry out mass detentions, stripping men to their underwear for questioning in what the military says is a security measure as they search for Hamas fighters. The Associated Press doesn´t have access to Kamal Adwan, but armed plainclothes members of the Hamas-led police forces – tasked with keeping security and officially separate from the group´s armed wing – have been seen in other hospitals. The Health Ministry said Israeli troops also set fires in several parts of Kamal Adwan, including the lab and surgery department. It said 25 patients and 60 health workers remained in the hospital out of 75 patients and 180 staff who had been there.