CHICAGO (STMW) — Multiple people were displaced after a fire rendered three attached homes uninhabitable Monday morning in north suburban Vernon Hills.

Crews were called to a fire in the 900 block of Jackson Court about 9:30 a.m., according to a statement from the Countryside Fire Protection District.

READ MORE: Two In Custody In Connection With Shooting Death Of 8-Year-Old Melissa Ortega

When firefighters arrived, they found smoke coming from the attic on the east side of a two-story town home, the fire department said. The homeowner told them that a plumber had been using a torch in the second-floor bathroom wall.

The fire spread from a second-floor common wall to the attic before it was extinguished, and two other units that shared the wall were affected, according to the fire department.

READ MORE: Chicago Weather: Slight Warm Up Overnight, Lake Effect Snow Returns

While it was not immediately clear how many people were displaced, the fire department said all three units affected by the fire were uninhabitable.

Multiple other fire departments assisted in battling the blaze, according to the statement.

The cause of the fire is still under investigation, although it started close to the spot where the plumber had been using a torch, fire officials said.

MORE NEWS: Ald. Carrie Austin Thanks City Council, Mayor For Support After Her Collapse At December Meeting

(Source: Sun-Times Media Wire © Chicago Sun-Times 2014. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)