Sarnia Fire and Rescue Services responded to a structure fire at James St. and London Rd. Friday morning.
Firefighters were called to 107 James St. just before 8:30am.
It appeared the blaze started in the garage of the fourplex and spread to two units.
All occupants made it out safely and no injuries were reported.
Damage is said to be extensive although no estimate was immediately available.
The cause of the blaze was under investigation.
