The cause for Sunday’s fire that happened at family-owned restaurant Señor Manuel Mexican Cuisine has been determined by Colorado Springs fire officials.

In a social media post, the Colorado Springs Fire Department on Tuesday said an electrical malfunction happened within a neon transformer, a device that increases voltage and sends electricity to power neon signs.

The fire at the business, at 4660 N. Nevada Ave., happened about 9 p.m. Sunday, according to fire officials. The fire took about 45 minutes for the nearly 70 firefighters put out.

No injuries were reported.

The Hernandez family, the owners of the over five-decades-old restaurant, said on Monday that total damage was still being assessed.

They also said it was too early to tell when, or if, the restaurant will reopen.