Two police officers have been arrested and suspended from duty and five others reprimanded over alleged serious misconduct.
An investigation was launched by the Police Service of Northern Ireland (PSNI) into claims surrounding a small team of officers based at Cookstown, Co Tyrone.
Assistant Chief Constable George Hamilton confirmed two officers were arrested and released on bail.
They were also suspended from duty following a proactive investigation by the PSNI's Service Improvement Department.
Another five officers have been repositioned within the service as part of the investigation, which is ongoing.
"Our priority will remain the delivery of a high quality personal, professional and protective police service for the community of Cookstown and the wider community of Northern Ireland," said Mr Hamilton.
"The police service expects its staff to behave professionally, ethically and with the utmost integrity at all times.
"Any conduct, whether on or off duty, which brings or is likely to bring discredit on the police service will be investigated in order to establish whether or not a breach of the code of ethics has occurred.
"A breach of the code may result in a criminal or disciplinary investigation by the office of the ombudsman or the police service and, consistent with the seriousness of an allegation, an officer may be suspended or repositioned pending the outcome of both a criminal and misconduct investigation."