The National grid who supply electricity to the London Underground said that there had been no cause for concern with regards to the electricity supply.
Two buses that were outside one of the stations were damaged in the explosions, some eyewitnesses saying that the bus was ripped apart like a can of sardines with bodies falling all over the place.
Hospitals are now only taking in emergency cases, officials say.
British Transport police say that the incidents happened at Aldgate, Edgware Road, Old Street, and Russel Square stations, although other locations have been reportedly affected by blasts too; King's Cross and Moorgate.
