As if there was any doubt it was deliberate, and not accidental, a quote from the Trib:
A case worker had just dropped off Powell’s sons at the home for a supervised visit, the source said. Powell then shut the door on the caseworker and locked it.
The case worker then reported smelling gas fumes, and then an explosion ripped through the home.
“Peace is not the product of terror or fear. Peace is not the silence of cemeteries. Peace is not the silent result of violent repression. Peace is the generous, tranquil contribution of all to the good of all." -Abp Oscar Romero