Wednesday evening around 9pm, Ladder 18 was alerted to assist Christiana on a Multi-Residential Fire at the Rockwood Apartments. While responding, Fireboard advises units that there were possibly subjects trapped in the building. Command 12 went on scene with fire showing and requested the second alarm. Ladder 18 arrived as the second ladder company and was assigned searches on the second floor and opening up on the third floor. All searches proved negative and the fire was stopped from running the attic space. Ladder 18 operated on the scene for 3 hours.