The apartment building's roof was collapsed in the Wednesday blast, its windows blown out and chunks of concrete littered the space between the tracks and the apartments.
Officials organized a visit to the area around the blast site in West on Sunday for a small group of reporters.
They did not allow reporters to see what was happening at the site, though four heavily damaged metal structures were visible from nearby.
At least 14 people are dead and 200 injured after the blast in the tiny Texas town.
Federal and state agents continue to work the scene. Authorities have not yet identified the cause of the blast.