Scores of witnesses told of the terrifying moment a bus exploded in central London during the rush hour.
Bystander Raj Mattoo, aged 35, was standing on a corner when the number 30 bus, travelling from Hackney to Marble Arch, exploded at Tavistock Square.
"The explosion seemed to be at the back of the bus. The roof flew off and went up about ten metres. It then floated back down," he said.
"I shouted at the passengers to get off the bus. They went into Tavistock Park nearby. There were obviously people badly injured."
Blood- soaked parking attendant Ade Soji, aged 35, of Dagenham, Essex, said he had to run for his life.
"I was helping a member of the public with directions when the bus stopped and the driver asked me the name of the street. I told him Tavistock Square and he called me over.
"Just as I was about to go, I heard the bus explode," he said.
"In another second I would have been dead. I had to run for my life. I looked back and saw the roof flying over."
The bomb rocked the Tavistock Hotel nearby, where many people sought refuge. Receptionist Sam Elliott said: "People were running in, some obviously injured.
"One man was being carried by other passengers. We just did not know what had happened."
Cycle courier Andrew Childes, aged 36, from London, was on his way to the British Medical Association's headquarters in Tavistock Square when the bus blast happened outside the building.
He said: "I heard a bang, a thudding deep sound. There was a big cloud of grey smoke. I was about 250 metres away at the time and I stopped dead in my tracks and didn't go any further.
"I waited for a bit and then went to see what had happened. The bus was just splintered metal, and it was all bent over. The top part of the bus was completely exposed, as if the roof had been ripped off it."
Taxi driver Michael Michael, aged 48, said: "I heard the sound, and I could see the bus from a distance. The roof went up. You could see a big impression in the roof and the rest of it was all off.
"It sounded like a gunshot, I thought it was a gunshot at first."
Gary Lewis described seeing casualties at King's Cross moments before the bus explosion. He was among passengers evacuated from a tube train at the station moments after the explosion there.
"People were covered in black soot and smoke. People were running everywhere and screaming. It was chaos.
"I came out into the ticket hall and saw casualties everywhere as medics tended to them. The one haunting image was someone whose face was totally black and pouring with blood."
Seconds after he ran from the station, he heard the explosion at Tavistock Square. "I turned to the right and I saw injured people all around. The bus looked like a massive twisted metal structure. I was in a bit of a trance. I was in tears because I didn't know what was going on."