The FBI is looking into an apparent data breach that affected more than half of the company’s data storage and access management systems.
FBI agents interviewed a senior software engineer at the company, and the FBI is reviewing the security measures and other measures taken by the company as a result, a law enforcement official said.
The investigation is ongoing and the company is cooperating with the FBI, the official said on the condition of anonymity.
The company said in a statement it is cooperating fully with the investigation.
The FBI and the Securities and Exchange Commission are also investigating.
The breach affects some 4.6 million people in the U.S., according to the company.
The vulnerability was discovered by the firm’s cybersecurity team and the federal government, said the company in a blog post.
The incident has raised questions about corporate integrity and the security of information stored on company servers.
A person familiar with the matter said the breach affects data stored on at least one of the firm, which stores financial and accounting data.
The person spoke on condition of being identified only as a government official.
The firm has not said how many people have been affected.
It is one of several large corporations that have experienced data breaches in recent years.
Microsoft Corp., Facebook Inc., Oracle Corp. and Google Inc. have all suffered data breaches.