A series of explosions rocked London's transport system at rush hour on Thursday morning, causing numerous casualties and leaving millions of passengers in shock, police said. The causes of the incidents -- which occurred one day after London was awarded the 2012 Olympics and as leaders of the Group of Eight rich nations met in Scotland -- were unknown but police said many of the city's underground stations were affected. "It is too too early to state what has happened," a London police spokesman said. "I cannot comment on reports of bombs, but we have had multi-reports of explosions around London." People were seen streaming out of one underground station covered with blood and soot. Passengers were evacuated from stations across the capital, many in shock and with their clothes ripped to shreds, witnesses said. The entire system was shut down and major thoroughfares were blocked off by police and ambulance services. An explosion also occurred on a bus at Tavistock Square in central London, a policeman told Reuters. "There have been some casualties and this has been declared as a major incident," said a spokeswoman for London's Metropolitan Police. --mor 1300 Local Time 1000 GMT
