http://news.bbc.co.uk/2/hi/uk_news/england/london/4659093.stm
CNN is covering, streets are being evacuated.
Emergency services have been called to London's Liverpool Street Underground station after reports of an explosion.
The incident has caused major disruption to the entire network with stations across the capital closed.
British Transport Police said there were "walking wounded" but one person's life was reported to be "at risk".
CNN is covering, streets are being evacuated.