U.K. police have said man who put bomb on London subway train bought most of parts for the bomb online. Police have accused 18-year-old Iraqi refugee of planting bomb on a busy commuter train on September 15. The bomber left his device on packed subway carriage during peak rush hour. The bomb exploded at Parsons Green subway station at 8.20am. It caused burns to face and body of 30 passengers. Police said there would have been more casualties if bomb had worked properly. It didn't detonate fully so there was less harm to humans than there could have been. Police said bomb contained, "knives, screws, glass and similar items to increase likelihood of death."
bomber bought many of the ingredients for his device from online shopping site Amazon. One of these ingredients was several hundred grams of explosive called TATP. This is also called "Mother of Satan" because it is so powerful. Police said bomber used it to create "maximum destruction". Reporters later checked Amazon for ingredients and were shocked to find that site directed them to other things that could be used to make bombs, in "items frequently bought together" tab. Amazon said it will work to stop this happening. It said: "In light of recent events, we are reviewing our website to ensure that all these products are presented in appropriate [way]."