VIDEO: 1 person has been badly burned in a fire near East Sahara Avenue and 6th Street. Las Vegas Fire & Rescue responded to the fire shortly before 6 a.m. It is believed that the building used to house a medical office. Boards can be observed covering windows and "No Trespassing" is painted on one side of the building. At this time, it is unknown what started the fire and who the injured person is. This is a developing story, check back for updates.