A witness told Reuters officials were paying close attention to the basements.

A person of interest has not been identified in what officials are calling an intentional act.

During the past 24 hours, our joint investigative team fielded nearly 500 tips.

FBI Special Agent in Charge Doug Core Nesky told reporters on Saturday that with scores of tips, investigators were working on identifying what appeared to be human remains amid the charred wreckage of Friday's explosion.

He did not say whether the remains might belong to a suspect.

Hundreds of agents and local police officers are scouring the site where on Friday a ah motorhome blaring a recorded warning blew up, injuring three people, destroying several vehicles and damaging dozens of businesses.

Nashville Police Chief John Drake There's about 40 buildings has been impacted, and eso those buildings will have to be cleared throughout codes.

Tennessee Governor Bill Lee said in a Twitter post that it was a miracle that no one was killed in the blast In a letter to President Donald Trump, Lee requested a federal emergency declaration for his state to aid in relief efforts.