April 15, 1993 LUCASVILLE, Ohio (AP) -- Military trucks and armed authorities were moving into position Thursday at a maximum-security prison where prison guards have been held hostage for five days. One hostage was found dead Thursday. Six military trucks headed for the Southern Ohio Correctional Facility cellblock, where the prisoners have barricaded themselves. Five of them were carrying armed troops. Contents of the sixth truck, which was covered, could not be seen. Sixteen military personnel vehicles also entered the compound. The standoff began Sunday when a scuffle among prisoners escalated into a riot.