The blast was felt across much of Davidson County around 6:30 a.m. Metro police said the explosion has been linked to a vehicle outside 166 Second Avenue N., the location of an AT&T data center downtown.
During a morning press conference, Metro police said they believe the explosion was an "intentional act."
Federal agents say the bureau has not yet determined the motive or if the explosion was in fact intentional.
Metro police spokesman Don Aaron said police received a report of a suspicious vehicle outside of the AT&T transmission building and upon investigating the report, officers called the hazardous devices unit.
Metro police said an officer suffered hearing loss from the explosion, but the department is hoping the hearing loss is only temporary.
BREAKING: Nashville fire crews being told to back up ANOTHER two blocks from site of explosion in downtown area.
Police said debris from the blast was found near the old Metro Courthouse and near the downtown pedestrian bridge. »