When firefighters arrived on the scene, flames were shooting from the building from all angles. Fire crews were able to get the flames under control around 12:30 a.m. on Friday and as of 3:30 a.m., firefighters were working on putting out hot spots.
Later Friday morning, officials reported the fire had rekindled in the basement. Fire crews were called back to the scene to help extinguish the flames. There were reports that diesel fuel was being stored in the basement, but it is unclear if the fuel contributed to the initial cause of the fire.
Firefighters fully extinguished the blaze before noon on Friday.
One Richmond Heights firefighter suffered a minor injury shorty after arriving on the scene. He was transported to an area hospital where he was treated and released. No other injuries were reported.
Firefighters said the building was a dentist's office belonging to MRH Dentistry. They also said the three story building was over 100-years-old and will be a total loss.
St. Louis County is investigating the cause.