Seven people were rescued and three firefighters injured after a blaze broke out in a Morris County residence on Saturday night. Boonton Fire Department responded to a structure fire at 121 Mechanic St. in Boonton around 11:15 p.m. The location is a two-story building with a machine shop on the first floor and a residential space on the second, according to Boonton Police Captain Christopher Petonak. When officials arrived on the scene, residents on the second floor were attempting to exit out the two front windows, but were unsuccessful, Petonak said. Using ladders, firefighters were able to …