HOUSTON -

Arson units are investigating the cause of a fire at doughnut shop in southeast Houston.

According to HFD  firefighters were called to the Mary Lee Donuts and Kolaches around 1:50 a.m Wednesday.

When units arrived at the business on 6150 Gulf Freeway, they saw heavy smoke coming from the one-story building.

Investigators say the business was locked at the time and was ruled a total loss.

No one was injured.