The Navy announced on Wednesday that the personal data of 134,386 current and former sailors was hacked, reports ABC News.
It's unclear when the hack actually occurred, but the Navy said it suspects the breach is connected to a compromised laptop belonging to a contractor working with Hewlett Packard.
A Navy official said that the breach maybe only included social security numbers and names.
"The Navy takes this incident extremely seriously. This is a matter of trust for our Sailors," said Chief of Naval Personnel Vice Adm. Robert Burke to ABC. "We are in the early stages of investigating and are working quickly to identify and take care of those affected by this breach."
The sailors whose data was stolen will be notified by email, letter, and phone, said the Navy.
The Navy released a statement on the matter via their website.
Burke's office says that there's no evidence yet that the stolen information has been nefariously used.
The Navy is looking into credit monitoring services for those sailors whose information was stolen.