A stovetop burner accidentally left on overnight was discovered to be the cause and origin of a blaze that heavily damaged a Kai­lua shopping center early Thursday, Honolulu fire officials said. 

Pets and staff from an animal hospital were evacuated after a fire broke out at about 3:14 a.m. at L&L Hawaiian Barbecue in the Aikahi Shopping Center. The fire was mainly restricted to the kitchen, said Hono­lulu Fire spokes­man Capt. David Jen­kins.

But Jenkins said five businesses, including the animal hospital, share a common attic space where there was possible smoke damage.

Damage to the building and its contents was estimated at $400,000. 

Thirty firefighters and eight fire companies responded to the two-alarm fire and brought the flames under control 10 minutes after the initial call.

No injuries have been reported.