Police have released the pictures of 14 people they want to speak to following loyalist riots over the flying of the Union flag over Belfast City Hall.
In the aftermath of the trouble the police set up a specialist team to round up those involved.
Detectives from Operation Dulcet want the public's help in tracing the 14 people caught on camera.
They want to speak to them in connection with their inquiries into incidents in east Belfast, south Belfast and Broughshane, Co Antrim, over the Christmas and New Year period.
Anybody with information about any of those in the pictures is asked to quote the number on the image when contacting police.
Violence first flared following a Belfast City Council vote on December 3 to only fly the Union flag over the City Hall on designated days.
The decision spawned weeks of unrest across Belfast, with a series of roadblocks and loyalist protests often leading to violent clashes with police.
To date, a total of 219 people have been arrested as part of the investigation. A total of 168 people have been charged, and 60 people have been reported to the Public Prosecution Service.
PSNI Detective Superintendent Sean Wright said the investigation has received strong support from the public.
"We have had a very positive response from members of the public to date," he said.
Anybody who may be able to identify any of the individuals is urged to contact detectives at the PSNI's major incident room on 028 9090 1775 from 9am to 10pm daily.