A Dorchester Road restaurant sustained significant smoke damage during a fire early Thursday morning.

North Charleston firefighters responded to Seņor Tequila restaurant at 9730 Dorchester Road just before 2:15 a.m., spokeswoman Bianca Bourbeau said.

Smoke was visible when firefighters arrived. The restaurant had significant smoke damage and some of the adjacent businesses in the strip mall had some damage, she said.

One firefighter was treated at the scene for heat exposure.

The cause of the fire is under investigation.