An investigation is underway after a redacted version of a leaked document from the PSNI was placed on a wall in West Belfast overnight.
It's claimed by Sinn Féin MLA Gerry Kelly that it proves that dissident Republicans do have information leaked from a major PSNI data breach.
Sensitive information about all serving officers was posted online in error last week.
It was one of two major data breaches which emerged, also including the theft of a laptop in July from a car.
The PSNI says it has been planning for this potential development - and that extra measures are already in place to protect officers.
