Sarnia fire and police are investigating, following a blaze at the Daysbreak Restaurant.

A fire broke out at the East Street South restaurant around 3 a.m. Wednesday morning. Upon arrival, firefighters discovered large plumes of smoke.

Crews contained the fire to the front portion of the restaurant, but there was still heat and smoke damage to the rest of the building.

Damage is estimated at approximately $400,000.

The cause of the blaze is undetermined and is now being probed by investigators.