Authorities had assembled on Saturday at Warner's home in Antioch, Tennessee, about 16km southeast of the explosion site. Several neighbours described seeing an RV similar to the one that blew up on Friday morning, in the backyard of the Antioch home in the months before the blast.
Mark Humphrey/AP
Investigators remove items from the basement of Anthony Warner's home in Antioch, located about 16km southeast of the explosion site.
Warner, 63, was not married and rarely ventured from his home, according to neighbours; he lived for years with his parents and then by himself. He once owned an alarm company, and he protected his home with an array of security cameras, rarely returning a neighbourly wave and not responding to an offer of Christmas dinner, neighbours said in interviews.