How can this be?

"There was a big blast followed by the sound of people screaming. I rushed to the window and it was just unbelievable. From what I saw the top half of the bus had been blown off. And people were wandering around in a daze."

"I was on the bus in front and heard an incredible bang, I turned round and half the double-decker bus was in the air ... It was a massive explosion and there were papers and half a bus flying through the air, I think it was the number 205. There must be a lot of people dead as all the buses were packed, they had been turning people away from the tube stops."

"I was on the train and there was a sudden jolt forward ... There was a really hard banging from the carriage next door to us after the explosion - that's where it happened. There was a fire beside me. I saw flames outside on the window of my carriage ... I saw bodies. I think some people may have died."

Oh, London. Oh, no.