Crews from seven fire departments fought a fire at a Willmar storage facility earlier this week.  

The fire took place Monday at Southside Storage near Menards.  Authorities say that the fire was in one of Southside Storage's three buildings, and spread to about 50 storage units.  

Officials say at one point ammunition in one of the units exploded. No one was injured in the fire.  

The cause of the blaze is currently under investigation by the State's Fire Marshal's Office.