Five people are in the hospital after a carbon monoxide leak at a hotel in downtown San Antonio. Officials say the five became sick while in the gym of the Hampton Inn and Suites by the Riverwalk, leading to a full evacuation of the hotel. The fire department says two of the victims need further treatment, while the other three were hospitalized as a precaution. The cause of the leak is being investigated.The San Antonio Fire Department and EMS treated five people for carbon monoxide poisoning at the Hampton Inn and Suites downtown.