The cause of a fire Sunday that consumed the Register Town Hall has been ruled, so far, undetermined, said Bulloch County fire Chief Christopher Ivey. The point of origin was found to be in the clerk’s office area of the former one-room schoolhouse, but state Fire Marshal Alan Logue and his assistant, Lee Hoover of the Alcohol, Tobacco and Firearms Division, found no conclusive evidence of what caused the fire, Ivey said. Logue and Hoover, who assisted Ivey in a training exercise over the two-day investigation Monday and Tuesday, “couldn’t rule out the cause was electrical,” but they couldn’t confirm the fire was not intentionally set, either, Ivey said Tuesday.