INDIANAPOLIS (AP) — Anthem Inc. is offering two years of free credit monitoring and identity-theft repair as the nation’s second-largest health insurer continues to investigate how hackers broke into a database storing information for about 80 million people.

The Indianapolis company didn’t detail those services in a brief statement on a website it established after announcing the breach last week. The website, www.anthemfacts.com, contains a letter of apology from company CEO Joseph Swedish.

The Blue Cross-Blue Shield insurer has said hackers evaded several security layers to reach the database sometime after Dec. 10 and Jan. 27, when a computer system administrator discovered outsiders were using his credentials to log into the system.

The nonprofit Identity Theft Resource Center says that attack was easily the largest it has recorded against a health care company.