The U.S. Postal Service says it’s the victim of a cyberattack and that information about its employees, including Social Security numbers, may have been compromised.

The FBI and other federal agencies are investigating.

Postal Service spokesman David Partenheimer says personal information that may have been obtained in the attack includes employees’ names, dates of birth, Social Security numbers, addresses, emergency contacts and other information.

However, he also says the customers at local post offices or those using its website, usps.com, were not affected. However, people who used its call center may have had telephone numbers, email addresses and other information compromised.

The agency isn’t recommending that those customers take any action.

(AP)