The Ujjain hotel tragedy killed four people trapped in a waste chamber. Two rescuers fell ill as the administration ordered a probe. Ujjain, Nov 1 (PTI) Four persons died allegedly due to suffocation while cleaning a waste chamber at a private hotel in Madhya Pradesh's Ujjain city, police said on. The Ujjain hotel accident killed four people cleaning a waste chamber, while two rescuers were hospitalised.