Around 11 p.m. on Wednesday, the Williamstown Volunteer Fire Department was called to a structure fire on West Fourth Street.
When crews arrived the structure was fully involved.
The Vienna Volunteer Fire Department, Williamstown Police, and Mon Power were all on hand.
Witnesses on scene say two people were living in the duplex and both made it out without injury.
No further details were immediately available.
We will update as more becomes known.