Sullivan County sheriff’s officials say a 60-year-old woman has died in a house fire in Kingsport. The cause of the blaze that killed Billie Sue Dykes and destroyed her home is under investigation. Neighbors say Alley “Junior” Dykes and his wife Billie Sue both were both disabled. Witnesses say the Dykes tried to put out the fire in their living room, which started around 8 a.m. Saturday. When the couple found the fire was too large, they tried to escape. When Billie Sue failed to follow, Alley went back to look for her. Alley told neighbors his wife was trying to put the fire out with a bucket of water, and he doesn’t know why she didn’t make it out. Her body was found near the back door of her home by firefighters. Authorities say Alley sustained burns over about 30 percent of his body. He was taken to a burn center for treatment.