NASHVILLE, Tenn. (AP) — Federal authorities identified on Sunday the man they say is responsible for the Christmas Day bombing and said that he died in the explosion.

Investigators used DNA to link the man, identified as Anthony Quinn Warner, to the blast. They said they believe no one else was involved.

Earlier today, authorities in Tennessee had shut down a road east of Nashville after stopping a box truck that they said had been playing audio “similar to what was heard” before a recreational vehicle exploded in downtown Nashville on Christmas Day.

The Rutherford County Sheriff’s Office says on Twitter that law enforcement officials had shut down a section of highway in Wilson County, just east of Nashville, on Sunday to investigate a white box truck parked on the side of the road. Authorities had sent out a robot to investigate the vehicle as officials stood far back, monitoring the situation.

Sheriff’s officials said the truck had been playing the audio when it was parked at a convenience store around 10:30 a.m. at the Crossroads Market in Walter Hill. The driver left the parking lot and was pulled over by deputies in nearby Wilson County. Officials said the driver has been detained by law enforcement.

A Wilson County dispatcher said the road that was shut down was Murfreesboro Road between Cedar Forest Road and Richmond Shop Road.

Deputies said they had also evacuated residents in the area as they continued to investigate.

Before the RV blew up, it blared a recorded warning calling for people to evacuate, and then the 1964 song “Downtown” by Petula Clark. Sheriff’s officials did not specify what the box truck was playing.

Nashville Police say a Tennessee man named Anthony Quinn Warner is under investigation in connection with the Christmas Day bombing that rocked downtown Nashville.

Metro Nashville Police Department Spokesman Don Aaron confirmed Warner’s identity Sunday. Federal and state investigators are trying to determine who set off a bomb inside a recreational vehicle Friday morning, injuring three people and damaging more than 40 businesses. They are also working to identify human remains found at the scene.

Separately, a law enforcement official told The Associated Press that federal investigators have started examining Warner’s digital footprint and financial history. They are also examining a recent deed transfer of a home in suburban Nashville.

The official could not discuss the case publicly and spoke to The Associated Press on condition of anonymity.

The official said forensic analysts are reviewing evidence collected from the blast site to try to identify the components of the explosives and are also reviewing information from the U.S. Bomb Data Center for intelligence and investigative leads.

Federal agents are examining a number of potential leads and pursuing several theories, including the possibility that an AT&T building was targeted. The bomb caused damage that affected communications in several states.

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