Police said a who bombed a London bought the parts . They said a left the bomb on a subway train. It exploded during hour at 8.20am. About 30 passengers had burns. Police said the bomb didn't work . It had knives, , glass and dangerous inside it.
The bomber bought things from Amazon. He bought an called TATP. It is very . Police said the bomber wanted " destruction". Reporters said Amazon's showed other things could make bombs. Amazon said it will make its are presented in a way.