Authorities on Thursday were trying to determine what sparked a fire that destroyed a barn and stable in the southern Illinois community of Tamaroa, killing two horses before the property owners could save them. With help of other relatives, Judy and Doug Heape managed to save a third horse, two combines and two tractors from the Wednesday fire, their daughter, Amanda Heape, told WSIL-TV.  An apartment attached to the barn also was destroyed along with 800 bales of hay, WSIL reported.  That dwelling’s occupant, Seth Heape, was not there at the time.  Family members believe the blaze began in that apartment.