The Federal Bureau of Investigation is trying to find out if the human remains found near the Nashville explosion site on Christmas morning belong to the people living there.

Tissue samples from the scene were confirmed by the Federal Emergency Management Agency as human remains. However, authorities did not confirm any fatalities from the Nashville explosion yet, said a report from USA Today.

So they are still confirming if the human remains are possibly from the said explosion.

"Intentional" Explosion Rattles Nashville On Christmas Day
Police close off an area damaged by an explosion on Christmas morning on December 25, 2020 in Nashville, Tennessee. Terry Wyatt/Getty Images

The FBI is also searching properties in Antioch, Tennessee, multiple law enforcement sources told ABC News.

Three people were reported to be injured from the explosion and are in stable condition, officials said. The FBI continued to investigate over 500 leads and tips on the case.

Information on the human remains was first reported by CBS News.

Nashville Explosion Remains a Mystery

Residents were unsuspecting on the Christmas morning explosion in a downtown Nashville community.

Gunshots were first heard in the area as a white motor home parked on their street a little before dawn.

A woman's voice emanating from the vehicle said a warning: there was a bomb that would explode in 15 minutes.

When the RV exploded, windows were shattered and flaming debris flew into the air, causing damage to nearby buildings, reported CNN.

The RV's unusual warning to residents likely saved the lives of nearby residents but the authorities also took the words seriously and cleared the area.

The motive for the disturbing explosion and the reason for the vehicle's warning remain unknown.

While the explosion remains a mystery, Mayor John Cooper said on Friday that the blast was caused by a "deliberate bomb."

At least 41 businesses were torn by the explosion and one building partially collapsed.

Concerned about the structural integrity of nearby buildings, the city cordoned off the area and people weren't allowed near until Sunday afternoon.

There seemed to be no signs of any additional explosive threats.

Person of Interest in Nashville Explosion Identified

Sources told news outlets that a person in question named Anthony Quinn Warner, 63, has been identified in connection with the explosion.

Warner had a similar RV model as the one linked to the explosion.

Federal agents are currently investigating his home. They also arrived on Saturday at locations connected to Warner in Antioch to conduct court-authorized searches.

One of the residents told ABC News that the RV was often parked near them.

"The RV's been there for a while; it doesn't really move. It just stays there," Hozen Rejab said. "So this was something that looked suspicious that it's not there anymore."

The FBI's public affairs officer, Darrell DeBusk, said no arrests have been made yet.

Recovering from Explosion Will Take a While

Given the severity of the situation, Mayor Cooper said getting the area back to normal will have to take some time.

"This was a terrible day, but Nashville has faced other challenges, particularly this year," Cooper said late Friday.

Cooper added that the area will "look like a construction site" for months.

Cleanup is expected to start by next week but checking the structural integrity of the homes is going to be the first part of the process.