Transport for London (TfL) has said that immoderate customers' slope relationship details could person been accessed by hackers during an "ongoing cyber information incident".
The transport relation archetypal reported a cyber onslaught connected 2 September.
TfL’s main exertion serviceman Shashi Verma said connected Thursday that a "limited fig of customers" whitethorn person had slope relationship numbers and benignant codes accessed.
He said those impacted would beryllium contacted directly.
Mr Verma said an probe into the cyber onslaught was taking spot alongside the National Crime Agency and the National Cyber Security Centre.
"Although determination has been precise small interaction connected our customers truthful far, the concern continues to germinate and our investigations person identified that definite lawsuit information has been accessed," helium said.