Reaction from people who witnessed the London blasts.
Sarah Reid
Was on the carriage next to the one struck by an explosion at Liverpool Street station.
"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".
"Some people took charge. We went out of the back of the carriage."
Police officer
At the scene of Aldgate blast.
"I was first on the scene at the explosion at Aldgate (at Houndsditch Road) all of which has now been evacuated. I was pulling people out of the bus. There are definitely some dead."
"Four bombs have gone off in London already - we are advising people to get off the streets. You are better off in a basement today - anywhere off the street."
Michael Michael
Picking up a fare from University College Hospital off the Euston Road at 9.30am, saw a bus explode.
"It was in a bus, bam, the top of the bus just ripped up. 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."
"There were police everywhere, the roads were all gridlocked, nobody could move. I had to turn my car off at one point."
Arash Kazerouni
Was on train at Aldgate when a the blast happened.
"There was a loud bang and the train ground to a halt. People started panicking, screaming and crying as smoke came into the carriage.
"A man told everyone to be calm and we were led to safety along the track."
"Everyone was terrified when it happened. When they led us to safety, I went past the carriage where I think the explosion was. It was the second one from the front.
"The metal was all blown outwards and there were people inside being helped by paramedics.
"One guy was being tended outside on the track. His clothes were torn off and he seemed pretty badly burned."
Belinda Seabrook
Saw an explosion rip through the "packed" bus as it approached Russell Square.
"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 with people turned away from Tube stops.
"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.
Andrew Childes
On his way to the British Medical Association's headquarters in Tavistock Place, Euston, when the Russell Square bus blast happened. Mr Childes said the explosion happened about 9.20am.
"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.
"There was a bit of panic going on, a few screams and shouts, but there wasn't massive panic. The police were already there because of what was happening on the tubes and quickly got things under control.
"I didn't see if anyone was on the bus or if anybody was hurt. Somebody told me they saw the driver running away from the bus but I don't know if that's true.
"I've never experienced anything like this before. I'm quite shocked. I need a hot cup of tea with some sugar.
"I've been trying to get hold of my family to tell them I am all right, but all the networks are down."
Simon Corvett
Had just got off a train at Edgware Road Tube station when the explosion happened. He joined other passengers to force open the train doors with a fire extinguisher.
"All of sudden there was this massive huge bang. It was absolutely deafening and all the windows shattered. The glass did not actually fall out of the windows, it just cracked.
"The train came to a grinding halt, everyone fell off their seats. There were just loads of people screaming and the carriages filled with smoke.
"You couldn't really breathe and you couldn't see what was happening. The driver came on the Tannoy and said `We have got a problem, don't panic'.
"You could see the carriage opposite was completely gutted. There were some people in real trouble."