BROWN DEER, Wis. (CBS 58) — About 30 first responders were called to a residential fire in Brown Deer Saturday evening after flames spread from an attached garage into a home.

According to the North Shore Fire Department, crews were dispatched around 6:40 p.m. to a reported structure fire on West Fairy Chasm Road.

Firefighters arriving at the scene found heavy fire coming from the attached garage of a single-family home, with flames beginning to spread into the residential portion of the building.

Crews immediately searched the home and determined nobody was inside.

Firefighters brought the blaze under control in approximately 40 minutes.

No firefighters were injured during the response, according to the department. An estimate of the damage was not immediately available.

Four engine companies, two truck companies, two ambulances and three chief officers responded to the fire, accounting for approximately 30 first responders.

The Brown Deer Police Department is leading the investigation into the cause and origin of the fire.

The Wisconsin Department of Justice Division of Criminal Investigation, Office of the State Fire Marshal and North Shore Fire Department are assisting with the investigation.