對於事件詳情，當地警方和應急人員還在調查中，目前透露出的資訊是，爆炸可能是一起與可疑車輛有關的“蓄意行動”。
“這起爆炸是為了製造混亂和恐懼。”納什維爾市市長庫珀說，該市將在爆炸發生地附近實施宵禁。
警方稱在發生爆炸的區域發現人體殘骸，目前尚不清楚這些遺骸是否與爆炸有關。當地官員表示，將對發現的人體殘骸進行檢查。
An early morning explosion has rocked the U.S. city of Nashville, Tennessee. Three are being treated for non-critical injuries after a recreational vehicle (RV) exploded in the downtown area. The police said the explosion was "an intentional act."
"This morning's attack on our community was intended to create chaos and fear in this season of peace and hope. But Nashvillians have proven time and time again that the spirit of our city cannot be broken," Mayor John Cooper said at a news conference after issuing a curfew for the area.
Flights out of Nashville airport were halted because of telecommunications issues associated with explosion downtown.
Two law enforcement officials told the Associated Press that human remains were found in the vicinity of the explosion. It was unclear how the remains were related to the explosion or whether they might belong to the person believed to be responsible or a victim.
"We have found tissue that we believe could be remains, but we'll have that examined and let you know at that time," Metro Nashville Police Chief John Drake said said, adding that police could not say whether it potentially came from someone inside the RV.
案發現場影片顯示，納什維爾市中心街道因爆炸引起大火併伴隨著濃煙，破碎的樹木和玻璃遍地，有3輛汽車被火焰完全吞沒。
納什維爾警察局局長約翰·德雷克說，警方當天清晨得知事發區域有槍聲，於是前往調查，聽到街邊一輛停著的房車傳出錄音警告聲，“炸彈將在15分鐘後爆炸”。
爆炸還波及了美國電話電報公司（AT&T）的一棟辦公樓，已導致納什維爾周邊大範圍通訊中斷。
據聯邦調查局前副局長安德魯·麥凱布介紹，聯邦調查局對待如此規模的爆炸事件，通常會視為“可能的恐怖主義行為”加以調查。
The Christmas Day blast, which rocked the heart of America's country music capital, came just moments after officers responded to reports of gunfire in the area and discovered the RV parked outside a downtown office tower at about 6 a.m. CST (1200 GMT).
Police heard a recorded voice warning that a "bomb would detonate in 15 minutes," Nashville Police Chief John Drake told reporters later.
The message, later broadcast on local media, said "This area must be evacuated now. This area must be evacuated now. If you can hear this message, evacuate now. If you can hear this message, evacuate now."
The blast sent black smoke and flames billowing from buildings, restaurants and shops, among which is a building owned by AT&T that lies one block from the company's office tower, a landmark in downtown.
Andrew McCabe, a former deputy FBI director, told CNN an explosion of this size would be investigated as a possible act of terrorism, whether domestic or international.
Police did not offer a possible motive for the apparent bombing. McCabe said police may have been the target of the explosion given they were called to the scene beforehand.
當地警方也將房車照片釋出在社交媒體上，說這輛房車當天凌晨1時22分駛抵現場，清晨6時30分左右爆炸。
Below are images of the aftermath of the early Christmas Day explosion. The Metro Nashville Police Department also posted a photo of the vehicle on its Twitter feed and said that the vehicle had arrived in the area at 1:22 a.m.