BP and the FBI both say it wasn't an intentional act but one has to wonder how they know that for certain so soon.  Details here.

FBI agents found "no evidence for any criminal or terrorist activity" linked to Wednesday's blast at the third-largest U.S. refinery, FBI spokesman Al Tribble said in Houston.

Two Islamist groups claimed responsibility, but BP also said it had ruled out sabotage as a cause of the third fatal accident in a year at the 71-year-old plant.

Of course various groups would probably claim responsibility if a meteorite fell on the Pope too.