LONDON (Reuters) - British security services have identified a suspect involved in the bombing of a busy commuter train in west London with the help of surveillance footage, Sky News reported, citing security sources.

"Security sources say they've identified a suspect involved in the Parsons Green bombing, with the aid of CCTV footage," Mark White, a home affairs correspondent for Sky News, said on Twitter.

(Reporting by Kate Holton; Writing by Alistair Smout)