A screengrab of surveillance footage shows the recreational vehicle used in the Christmas day bombing in Nashville, Tennessee. The girlfriend of the man who carried out the attack says she warned police in August of last year that he was making bombs in his RV.

NASHVILLE, TENNESSEE – DECEMBER 25: In this handout image provided by the Metro Nashville Police Department, a screengrab of surveillance footage shows the recreational vehicle suspected of being used in the Christmas day bombing on December 25, 2020 in Nashville, Tennessee. A Hazardous Devices Unit was en route to check on a recreational vehicle which then exploded, extensively damaging some nearby buildings. According to reports, the police believe the explosion to be intentional, with at least 3 injured and human remains found in the vicinity of the explosion. (Photo by Metro Nashville Police Department via Getty Images)