Lansing, MI-Two large propane tanks exploded into a fireball at a construction site in Delta Township Monday night. Fire officials say the two 300-pound tanks blew up around 10:45pm at an apartment complex under construction near Saginaw and Nixon Road.

They say extremely-hot fire damaged siding, melted windows and even chipped the sidewalk. Officials say workers were inside the buildings at the time of the explosion. No one was injured. Initial reports say the fire was caused by a leaky propane tank, ignited by a heater.