Structure Fire On Exmouth file photo.

The Sarnia Fire and Rescue Service was kept busy Saturday.

At around 4pm while crews were putting out a field fire in the 1700,block of Plank Rd., they were called to a house fire in the 800-block of Exmouth St.

The blaze at an attached condo began in the basement and broke through to the main floor.

The residents, a man, woman and baby, escaped unharmed.

Damage is estimated at $25,000.

The investigation into the cause was continuing.