OCONOMOWOC, Wis. (CBS 58) -- Western Lakes Fire District responded to a fire at TownePlace Suites in Oconomowoc on Tuesday, Jan. 27.

A partial evacuation had taken place when crews arrived and began investigating the alarm. Visible smoke on the fourth floor lead to an upgrade to a structure fire response.

Crews discovered an attic fire after breaching the ceiling and began putting it out.

Multiple fire departments responded including Lake Country, Hartland, City of Waukesha, Merton and City of Brookfield. Additional units from Pewaukee, Watertown, Mukwonago and Vernon provided coverage for secondary calls during the incident.

The fire was reportedly caused by an extension cord powering a heating unit near sprinkler pipes.

No injuries have been reported.