Cows getting bigger,
There is a pic doing the rounds with what looks like a bang seat in the air, albeit on fire, with what appears to be a person in it. The angle it is at is consistent with the angle of the jet at the time and the canopy on the aircraft is up.
I'm saddened but not surprised at the Police Superintendent warning of further fatalities. Having been in the emergency services for some eighteen years, I would take that as a very high probability. They generally only hint like that when they know themselves, but it's too early to formally confirm. A terrible day.