Alpha Epsilon Pi’s national headquarters has ordered its Madison chapter to stop most activities while the fraternity investigates allegations of hazing and other potential health and safety violations. The cease-and-desist directive, announced Sept. 27, bars the chapter from holding new-member meetings, social and brotherhood events, philanthropy activities, gatherings and chapter social-media activity. Essential administrative work by the executive board may continue, the fraternity said. The investigation will guide recommendations to AEPi’s Supreme Board of Governors on possible further action against the chapter or individual members. The order follows a police response last week at the fraternity house, where Madison officers found 30 pledges in the basement covered in food, condiments and other liquids. Madison Police Capt. Kipp Hartman said at a news conference that several had visible injuries consistent with physical assault. He also said the room’s thermostat was set to 81 degrees, producing a hot, humid environment. Police arrested chapter officers Brayden Klein and Samuel Vane. The Dane County Sheriff’s Office said both were released from jail on $400 bonds. The allegations have not been established as findings of guilt. The University of Wisconsin-Madison ended its affiliation with the fraternity in 2015. The chapter can nevertheless continue to operate because AEPi’s national organization still recognizes it, the university said.