Here are some quotes from CNN and other media of eyewitnesses:

“We were packed like sardines, waiting to die.”

“There were obviously people badly injured. A parking attendant said he thought a piece of human flesh had landed on his arm.”

“I was on the bus in front and heard an incredible bang. I turned round and half the doubledecker bus was in the air.”

“I was in the front of the first carriage and there was a huge, massive hole in the carriage. As I went past the second carriage I could just see the bodies lying all over the floor.”

The casualty count is going to get a lot worse.