investigators said they found the origin of the explosion but it won't say where or what triggered it and still aren't sure what caused wednesday's initial fire. >> we know there was an initial fire and explosion. >> reporter: local authorities say everyone is accounted for and they don't expect to find any more bodies. 14 people were killed including buck uptmor. >> such a big hole. such a big hole in it now. >> reporter: more residents were allowed back into their homes but the area closest to the plant is still off-limits. >> my daughter's house is caved in, but we at least would like to be able to get in and start cleaning up and salvaging what can be salvaged. >> we have to have church outside. >> reporter: on this somber sunday in texas, a congregation celebrated mass outside knowing their town would never be the same. gabe gutierrez, nbc news, west, texas. >> that's a long road ahead for