because the company does not store that information online . Eurostar has yet to confirm how many people have been affected by this data breachAttack.Databreachor whether any data has been takenAttack.Databreach. The company has reported the data breachAttack.Databreachto the Information Commissioner 's Office . `` We have taken this action as a precaution because we identified what we believe to be an unauthorised automated attempt to accessAttack.Databreacheurostar.com accounts using your email address and password , '' the company told customers . `` We 've since carried out an investigation which shows that your account was logged into between the 15 and 19 October . If you did n't log in during this period , there 's a possibility your account was accessedAttack.Databreachby this unauthorised attempt . '' Customers were told to check their accounts for `` anything unusual '' and update login details on any other site where they use the same password . A Eurostar spokesman said : `` This email was sent after we identified what we believe to be an unauthorised automated attempt to access customer accounts , so as a precaution , we asked all account holders to reset their password . We deliberately never store any payment details or bank card information , so there is no possibility of those being compromisedAttack.Databreach. '' An ICO spokesman said : “ We ’ ve received data breachAttack.Databreachreport from Eurostar and are making enquiries. ” Last week , British Airways revealed that almost 200,000 further passengers may have had their personal data stolenAttack.Databreachby hackers in the September attackAttack.Databreachin what experts described as one of the biggest breachesAttack.Databreachof consumer data the UK had ever seen .