There are still questions that investigators are looking into, but much more was revealed yesterday afternoon on the explosion from Monday night that caused a man to be airlifted to the Johnson City Medical Center. Deputies and Zionville Fire Department responded with Watauga Medics to 179 Lola Perry Road in Zionville after Kevin L. Isaacs suffered life threatening injuries in the 7pm blast. Deputies discovered that Isaacs had been disassembling old blasting caps and removing the explosive materials when something sparked the unstable chemicals and an explosion occurred, according to the release. Deputies found over 100 more live blasting caps outside at the scene which prompted deputies to contact the Wilkes County Sheriffs Office Bomb Squad. As the outside area was being processed, deputies obtained a search warrant for the residence to insure that there were no other explosive devices inside, and there found numerous blasting caps and other implements which the Wilkes County Sheriffs Office Bomb Squad removed. The bomb squad decided to detonate the remaining blasting caps at the scene due to the age and type of explosive material used in their production. Sheriffs Len Hagamans release said the investigation is continuing to determine where the blasting caps were obtained and why they were being disassembled.