A 1926 office building shared by a longtime Miami physician and a certified public accountant burned today.

Miami Fire Chief Kevin Trease said firefighters were called to the scene at 7:01 this morning and, as of 10 a.m., were still on the scene.

Downtown streets were blocked as Miami Police Department secured access to nearby fire hydrants within a four-block area of 32 A St. SE.

Dr. Lewis Bamberl and accountant John Ober share the two-story, brick, 81-year-old building.

Trease said a preliminary investigation indicates that the fire was electrical in nature and started in the reception area of Bamberl's office.

The physician's office received extensive fire and smoke damage, according to Trease.

Ober's side of the building suffered significant smoke and heat damage, the fire chief said.

An estimated 20 firefighters were at the scene and battled the blaze which moved from the front of the office building into the elevator shaft and into the vacant second story.