One of the offenders has been unlawfully at large for more than 20 years.
The Department of Justice has asked that if a member of the public sees anyone matching any of the descriptions issued relating to the men they should call their nearest police station or contact Crimestoppers anonymously on 0800 555 111.
5. Thomas O'Brien
Unlawfully at large since July 16, 2012 from HMP Magilligan. He is described as being 1.65m in height, of medium build, with a fresh complexion, blue eyes and dirty fair hair. He has the following distinguishing marks - a tattoo on his upper left arm of two scrolls (father and mother), a tattoo of a girl's head on his upper right arm one of a cow girl on his lower right arm. His offence is listed as causing death by dangerous driving. Photo: Department of Justice
6. Brendan McGuinness
Unlawfully at large since May 2, 2002 from HMP Hydebank Wood. He is described as 5' 10" in height, of light build and with brown eyes and fair hair. His offence is listed as drug related. Photo: Department of Justice