Multiple agencies responded to a fire Sunday morning at Wagon Train BBQ in Schenectady.

Authorities say crews were called to the restaurant at 671 Mariaville Road around 6 a.m. Sunday.

A CBS 6 crew saw firefighters and EMS crews from Schenectady, Canaan, and Rotterdam at the scene and smoke coming from the back of the building.

A spokesperson from National Grid said crews were also called to the fire. The restaurant is located in close proximity to high voltage power lines.

National Grid turned power off to the area. At one point about 20,000 customers were without power.

No word yet on how the fire started.

This is a developing story. Stay with CBS 6 for updates.