london city police superintendent sir alan blair has confirmed that there have been three big blast on tube vehicles at warren st , rectangular and runner ' s bush wards , and one significant one on a no . 26 platform on hackney road in malachite green . the london transport service has not found any injured people , but single person has reported themselves to a local hospital . it is not yet known if this is linked with the blasts .
Police report there has been an explosion in the tube station.