London Tube Saga - One Injured

From BBC:

At Oval station there was a minor explosion. Then a man ran off when the Tube reached the station.

Meanwhile the driver of Stagecoach Bus No 26 bus heard a bang on the upper deck while travelling through Shoreditch. He went upstairs and found the windows were blown out. You can imagine he was badly shaken but he’s OK.

At Shepherd's Bush station, police said a man had threatened to blow himself up and then ran off.

One person was injured at Warren Street, although the person's condition is unknown.
But BBC said the explosions were of a minor nature and believed to have used detonators only.