Note : Police and intelligence services did all they could to trace suspects . Impossible to trace every person connected to the plot , it added . # ##4 , 700 people were killed in July 7 , London bombings . Despite the increased efforts of the agencies , and the increased resources at their disposal , the odds are stacked against them . '' All four bombers died in the blasts in central London .
Note : Police and intelligence services did all they could to trace suspects . Impossible to trace every person connected to the plot , it added . # ##4 , 700 people were killed in July 7 , London bombings . All four bombers died in the blasts in central London .