PHOTOS: Three people are in critical condition after a house fire on Tucson’s south side on Thursday, Jan. 7. Firefighters from the Tucson Fire Department responded to the 2200 block of East Irene Vista just after 9:15 p.m. to a fully involved fire. The fire was fully contained at about 10 p.m. There were no injuries to firefighters, and investigators are working to locate the cause of the fire. We will have updates in this story when more information is available.