The U.S. Marshals Service (USMS) suffered a security breach over a week ago that compromised sensitive information, NBC News reported on Monday, citing multiple senior U.S. law enforcement officials.

"The affected system contains law enforcement sensitive information, including returns from legal process, administrative information, and personally identifiable information pertaining to subjects of USMS investigations, third parties, and certain USMS employees," the agency spokesperson Drew Wade told NBC.

USMS did not immediately respond to Reuters request for a comment.

  - Reuters