WARREN, NJ - The sirens heard last night were not in Warren. Area emergency crews responded to a fire at a mixed-use building in Morristown on Friday night. The blaze began at around 11 p.m. 
 
Sirens were heard miles away as area first responders rushed to the scene on Elm Street and the blaze could be seen from I-287. The building is comprised of businesses and apartments and there is no word on whether any injuries were reported.