Union Grove house fire near 11th and New, multiple agencies respond

UNION GROVE, Wis. - A fire tore through a home in Union Grove on Thursday night, Feb. 20.

What we know:

It happened near 11th Avenue and New Street. The Union Grove-Yorkville Fire Department responded around 8:15 p.m. and found "heavy advanced fire showing from the entire home."

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"We saw a cop running up the street with flashlight on, and then we heard a huge pop," said Alissa Mucchi.

Multiple area fire departments were called to help at the scene, which was deemed under control around 9 p.m. No injuries were initially reported.

Union Grove house fire near 11th Avenue and New Street

What we don't know:

The fire remains under investigation. It's unclear what started the fire. More than 22 hours after the fire started, investigators were still at the scene searching for clues.

What they're saying:

Multiple people who live on the block told FOX6 News the home was vacant and under renovation. Mucchi said a justice department investigator came to her door.

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"It's a little crazy that we moved here a year ago, and now there's crime scene tape," she said. "We've got cops asking if we've seen anything, seen suspicious people."

As detectives canvassed the area, Ali-Rae Knapp said she handed over video of something she considers eerie.

"The only thing you could notice is there was one vehicle, and you could see the person in it kind of observing the fire as it began," she said.