Several tube stations - Aldgate East, Liverpool Street, Kings Cross, Edgware Road and Russell Square.
TV still saying that it was some sort of power surge - but people coming into my office (in Holborn) are talking bomb and the day after the Olympic result is eyebrow-raising.
Lots of sirens and helicopters.
Beeb report here:
http://news.bbc.co.uk/1/hi/england/london/4659093.stm
I just talked to my son, he and his group over slept this morning because they had a final dinner last night and should have been on that train. My son was so stunned that he couldn't talk when I told him which stations were involved. The whole group of students should have been on that train.