A poster containing the details of three serving PSNI officers has been found stuck to a bus shelter in Co Derry.
The item was discovered at Chapel Road, Dungiven last night.
Assistant Chief Constable Chris Todd said the officers had been informed of the development and acknowledged the impact it would have on them.
"We are aware that a poster claiming to contain details of three serving officers was placed near a bus shelter on Chapel Road in Dungiven last night," he said.
"This was a clear attempt to intimidate police officers, staff and their families but police can confirm that the information contained on the poster is incorrect.
"We have commenced an investigation into this matter and I appeal to anyone with any information relating to this incident to contact police on 101.
"We are particularly keen to hear from anyone who was travelling through Dungiven last night and who has any dash cam footage."
On 8 August, the PSNI inadvertently published details of almost 10,000 serving officers and civilian staff.
The information was in the form of a spreadsheet attached to a published Freedom of Information request.
The detail included the surname, initials, rank/grade, role, service number, department, location, duty type and gender of all serving officers and staff.
The PSNI has confirmed that the information is now in the hands of dissident republicans.
The data breach has contributed to huge pressure on PSNI Chief Constable Simon Byrne to resign.
"The safety and welfare of all our officers and staff remains our priority and additional security and reassurance patrols have already been implemented across Northern Ireland as part of our organisational response," ACC Todd said.
A senior British police officer has been appointed to conduct a review of the data breach.
It is expected to be concluded by the end of November.
One man has appeared in court charged with possessing information released in the data breach.
East Derry MLA Cara Hunter said that many officers and their families are "living in fear" following the data breach.
"Given the sensitive nature of policing here, it's imperative that officers feel as safe as possible in their homes and in their communities, and it’s disgraceful that anyone would try to exploit this to intimidate or to put officers in real danger.
"I’m deeply disappointed that details relating to officers have been posted in the Dungiven area and I welcome their swift removal.
"Those who seek to intimidate or threaten police have no support from the local community here and any attempt to use information about police officers in this way should be fully condemned and rejected," she said.
Additional reporting PA
