Police hunt Parsons Green Tube bomber

A huge counter-terrorism operation is now under way at  Parsons Green in west London,after this morning’s explosion on board a crowded Tube train. Witnesses described the panic as a “huge fireball” went off,  sending a “wall of flame” through the carriage. Twenty-nine people were hurt, none seriously. Police are searching for the person who planted the device, which reportedly contained a timer.