(CHRISTOPHER, IL) — The state fire marshal is investigating a fire that happened around 4 Thursday morning at a home in the 400 block of Helen Avenue in Christopher.  Christopher Fire Chief Gene Payne told WSIL-TV it’s unknown what caused the fire at this time, but he won’t say if it’s suspicious due to the fact that neighbors said there has been a lot of police activity at the house. Utilities to the home were not on when the fire happened.  Payne says the fire did start in the front room of the home. No one was at home when the fire started.