The attack appeared to target the firm's US operations, was discovered in March and could have begun as early as October 2016.
LONDON/TORONTO: Global accounting firm Deloitte said it was the victim of a cyber attack that affected the data of a small number of clients, providing few details on the breach.
Deloitte said in a statement that attackers accessed data from the company's e-mail platform, confirming some details in a report by the Guardian newspaper, which broke news of the hack on Monday.
