Public transport provider Go-Ahead Group has been hit by a cyberattack but insists there is 'no impact' on its services for passengers.
In a statement, the company said it is "currently managing a cyber security incident after detecting unauthorised activity on its network on Monday 5 September 2022".
The group operates bus services in the UK, Ireland and Singapore, and rail services in the UK, Germany and Norway.
The statement adds: "Upon becoming aware of the incident, Go-Ahead immediately engaged external forensic specialists and has taken precautionary measures with its IT infrastructure whilst it continues to investigate the nature and extent of the incident and implement its incident response plans."
The company will "continue to assess the potential impact of the incident" and has informed "relevant regulators, including the Information Commissioner's Office in the UK".
The statement concludes: "The Board will provide a further update as and when appropriate."
Go-Ahead says it is the largest operator of bus services in London, and its regional buses account for about 11% of the UK market, with its rail services "responsible for over 30% of all train passenger journeys" in the UK.