A terrorist incident's been declared in London after an explosion on a tube train.
It happened at Parsons Green station in the south west of the British capital.
A number of people have been reported injured.
Natalie Powell is at the scene.
IN: "A significant…
OUT: …burns."
DUR: 44 seconds
ALT:
Natalie Powell is at the scene.
IN: "According…
OUT: …perpetrator."
DUR: 35 seconds