London Tube blast treated as terror incident

[Heathblue]

as for the question, the people were injured by flash burns

listening to a bomb expert on TV, the bomb would have produced a fireball ( flash ) as it was not packed with nut and bolts etc etc to cause more damage

thus people have suffered burns

I never listened to the bomb expert but would be interested to know how this fireball flash put 20 odd in hospital, but left the white plastic in almost pristine condition and 80% of the lidl bag intact