By Jeremy Coumbes on May 24, 2021 at 11:04am n investigation is ongoing into a structure fire in Jacksonville that authorities have deemed suspicious in nature. The Jacksonville Fire Department responded to a call of a possible structure fire at 741 North Main Street at approximately 6:45 Sunday night. Jacksonville Fire Chief Doug Sills says the fire had fully consumed the interior of a portion of the structure when crews arrived. “ Upon arrival, there was heavy fire involvement in the garage on the north side of the structure. Crews were informed once they got on scene that there were possibly two residents still inside.