In Tennessee, authorities say a 63-year-old white man whose body was found at the scene of a Christmas morning explosion in downtown Nashville was responsible for the blast. Anthony Quinn Warner was a self-employed computer worker. Before the blast, an RV with a recorded message warned area residents to evacuate.

Recorded voice: “If you can hear this message, evacuate now.”

Authorities say Warner’s DNA was found among the wreckage. No motive has been identified, and no other fatalities were reported. Three people were injured. The blast damaged dozens of structures and caused at least one building to collapse. The bomb went off outside an AT&T transmission building, disrupting services, including some 911 calls.