WASHINGTON — The Navy says the names, Social Security numbers, and other details of 134,386 current and former sailors have been breached on a contractor’s laptop.

Investigators determined this week that the information had been accessed by unknown people, and the Navy has begun notifying affected sailors.

On Oct. 27, Hewlett Packard Enterprise Services told the Navy that the laptop of an employee working on a Navy contract had been compromised.

Vice Admiral Robert Burke said the Navy is in the early stages of investigating, and his office says there’s no evidence to date that the information has been misused. The Navy is looking into credit monitoring services for the affected sailors.

Associated Press