DALLAS (CBSDFW.COM) – Dallas firefighters quickly knocked down a fire in the heart of downtown early Friday morning.

There were concerns the restaurant fire near Main and Akard would spread to a high rise next door.

When firefighters arrived at the 3-alarm blaze they reported heavy flames were shooting out of the front windows of the restaurant.

The fire was contained to the Sabor Taco Bar – but smoke did drift into other neighboring businesses.

The cause of the fire is not known at this time.