Krishnakumar Nair (Tavistock Square)
"We heard an explosion ? something like a big bang, sort of muffled inside a metal container. We looked back ... and saw a huge metal scrap thing on the road, with a few fumes coming out. Someone was on the road trying to pull something out of it."
Tycie West (King's Cross)
"An automated voice came over the loudspeaker system asking for passengers to evacuate the station. I'm now amazed at how dismissive everyone was, myself included.
"No one paid any attention to the announcement and we all continued to stand on the platform waiting for the next tube! It wasn't until a London Underground worker came bellowing down the platform ? about thee minutes later ? that people started to move, and then they were moving really slowly, huffing and puffing in annoyance."
Lee Rogers (Liverpool Street)
"A train pulled up on the other side platform. The doors opened and as everyone was starting to get off, I saw a few lights starting to flicker overhead and then there was an explosion on the opposite side to me, just behind the train that had just pulled in."
Jota Branco (Liverpool Street)
"Halfway up the escalator, I felt the stairs shake a little and then there was a cloud of smoke that shot up from underneath the stairs. The alarm went off and people went crazy and just ran out of the station."
Lynzi-Alana Ashworth (Tavistock Square)
"The bus exploded outside, and the building shook. They are now using our foyer for casualties. There are lots of very sick people, with arms and legs missing."
Belinda Seabrook (Tavistock 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. It was a massive explosion and there were papers and half a bus flying through the air."
Kurush Anklesaria (Paddington)
"I was on the train going from Bayswater station sitting in the first compartment of the train and after passing Paddington station at around 8.50am there was a huge blast just at the side of my feet and part of the floor was ripped open."
David Jones (Tavistock Square)
"There was not a lot of fire, but there was a lot of smell of an explosion and at that point people wanted to walk away from what they had seen."
American tourist (Tavistock Square)
"We heard the explosion, turned around immediately, and saw the bus go straight up, the whole top of the bus, everything.
"There was metal, there was wood, everything just straight up in the air. We did not see any bodies. They got us off the street so fast, and around the corner because they said there could be a second blast.
Arash Kazerouni (Aldgate)
"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.
"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.
Scott Wenbournen (Aldgate)
"I saw three bodies on the track. I couldn't look, it was so horrific. I think one was moving but I'm not too sure. There were also, I think, some bodies in the carriage. Some were moving but I couldn't really look. No one was attending to them."
Terry O'Shea (Aldgate)
"As they led us down the track past the carriage where the explosion was, we could see the roof was torn off it, and there were bodies on the track.