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A suspected gas leak and home explosion in Oswego caused the massive fire that rattled neighboring homes, officials said.
Oswego fire officials say the people who lived in that home are still unaccounted for.
Chopper 7 was over the scene of the explosion that happened around 5 p.m. in the 200 block of on Fox Chase Drive, where a home appeared to be mostly destroyed, directly across from Fox Chase Elementary School.
Oswego police said they were closing streets in the area of the fire.
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In an update late Thursday, fire officials told ABC7 that two people inside the house remained unaccounted for following the explosion and fire.
Neighbors said right before the fire broke out, they heard what sounded like a loud boom. Then they felt their homes shake before seeing a large plume of smoke and fire.
"It was a two-story house, currently all that is standing is the front portion of the garage," Oswego Fire Chief Joshua Flanders said.
Multiple fire crews battling the flames in the frigid cold into the evening hours.
"We're bringing in heavy equipment to pull pieces of the house apart so that we can finish extinguishing the fire," Flanders said. "When we arrived, we found a two-story house that was fully involved in fire and large portions of it collapsed."
Oswego's fire chief says fire investigators from Oswego, neighboring communities, the state fire marshal's office and ATF will be assisting in the investigation.
The chief said Nicor shut off the gas to the home.
While there was minor damage to the two neighboring homes, fire officials say there is no danger to other homes in the area.
No further information was available.