ESSEX JUNCTION — Firefighters are trying to fire out what caused a fire at a Wendy’s restaurant in Essex Junction, Vt.

Deputy Fire Chief Phil Noyes said he believes Wednesday’s fire started in a rooftop vent unit in the kitchen, but added that wasn’t the conclusion yet. The fire was between the ceiling and the roof.

The Burlington Free Press reports (http://bfpne.ws/Tfg7IV) Noyes said a handful of employees were inside the restaurant preparing to open when the fire broke out at about 8:45 a.m.

No one was injured.