Commuters were caught up in the horror of a terror attack at a Tube station in west London on Friday.
Armed police close to Parsons Green station (Dominic Lipinski/PA Wire/PA Images)
People stream away from the scene of the explosion (Alex Littlefield/AP)
Police put up cordon tape outside the Tube station at Parsons Green (AP/Kirsty Wigglesworth)
An injured woman is assisted by a police officer (Dominic Lipinski/PA Wire/PA Images)
The police presence was huge at the west London station (AP/Kirsty Wigglesworth)