No.....
Transformer exploded. No bomb. No terrorist.
That's what they said in 1993 when the World Trade Center was bombed. They kept to that story for at least three days; the next day's copy of the NY Times had illustrations and everything about how a transformer fire caused the explosion.
Only it wasn't true.
And you know what the first reports from London were dontcha?
Why is the bomb squad down there?