A fire investigator is working to piece together what happened after a pair of house fires in the Riversdale neighbourhood early Monday morning.
Crews were called out just after midnight following reports of flames spotted coming out of neighbouring homes at 406 and 408 Avenue H South.
Upon arrival, firefighters went into both houses to make sure no one was trapped inside.
The flames appeared to be concentrated in the attics of both homes.
No injuries were reported.
By 4:30 p.m. Monday, investigators determined the fire started between the two homes, but were still working to determine a cause.
Damage was estimated at $400,000.