Investigators are still trying to figure out what sparked a house fire that killed three people in Waterloo earlier this month.

According to Waterloo Fire Rescue Chief Pat Treloar, the official cause is still classified as undetermined. However, results of a preliminary investigation show that an electrical problem likely sparked the deadly blaze at 1815 Commercial St.

"We do not believe there was any deliberate human involvement with the ignition of the fire," Treloar said.

According to the chief, investigators continue to evaluate potential ignition sources in the area where the fire is believed to have started.

A mother and two of her children died in the fire that gutted the one-and-a-half story home on March 15, 2018. The victims were identified as: Amber Everman, 33; Amari Burkett, 9; and Ava Everman, 5. All three died at a local hospital after firefighters pulled them from the burning house.

Firefighters were called to the scene around 4AM after a girl escaped through a window and flagged down a passing motorist for help.