ATLANTA -- Authorities are waiting for autopsy results to reveal the identity of a man who is the first victim of a tornado that tore through downtown Atlanta last week.

Workers clearing rubble at an office building on Saturday found the man's body as they were scooping up bricks and debris. They called police after seeing a hand sticking out of the rubble, said Atlanta Police Department spokesman Officer James Polite.

The man is believed to be in his early to mid 40s. Because the man had no identification, authorities are waiting for the Fulton County Medical Examiner's Office to perform an autopsy to determine his identity, Polite said on Sunday. The man was wearing a wedding band.

"Right now, we have no clue," Polite said. "It's all in the hands of the medical examiner to see what they can come up with."

The single-story, flat office building - which was located southwest of downtown Atlanta, not far from the end of the six-mile path the twister took through the city's core - was apparently vacant, but may have been formerly leased by a small church group, Polite said. The man likely headed for the building when the tornado hit with little warning.

"We believe the man was seeking shelter from the storm and did not make it into the building," Polite said. "He was facing the wall when we found him."

The back wall of the office fell onto the man, Polite said. Police brought in two cadaver dogs to search the area in case more bodies were found buried in the rubble, but no additional ones were found. The building was demolished on Saturday after it was found to be unstable.

The tornado ripped through the city's downtown March 14, knocking out hundreds of windows, scattering debris across Atlanta's core and sending trees crashing into homes in nearby neighborhoods. At least 27 people were injured in the storm, but until Saturday police believed no one had been killed.

Another tornado that hit three counties in northwest Georgia on March 15 killed Jerry Paul Albers, 71, of Floyd County and Bonnie Turner, 63, of Polk County.