There is shock and grief in London as suspected terrorist bomb attacks left at least 33 people dead and hundreds more injured.It has now emerged that there were four coordinated explosions – three causing carnage on packed underground commuter trains, and one on board a double decker bus. The 33 confirmed deaths were in the explosions on the Tube. The number of people who died in the blast on the bus is yet to be confirmed. Among the hundreds of people taken to hospital, about 45 are said to be in a serious condition. The explosions came as Britain began hosting the G8 summit in Scotland, attended by world leaders including the President of the United States. It also came a day after London won the right to host the 2012 Olympics. A German newspaper’s website said a previously unknown group called “The Secret Group of al Qaeda’s Jihad in Europe” claimed responsibility for the attacks.