A 33-year-old man has been charged with murdering prison officer David Black, who was gunned down on a motorway in Northern Ireland as he travelled to work.
Dissident republicans opposed to the peace process were blamed for the attack on the M1 motorway in County Armagh in November 2012.
He was the 31st member of the prison service to be killed in Northern Ireland, the first such murder in almost 20 years.
The suspect, who was detained yesterday in the Lurgan area of Co Armagh, is to appear in court in Craigavon later today.
A PSNI spokeswoman said the force wanted to thank Irish police for their help and support throughout a "difficult and complex" investigation spanning both sides of the border.
More top news
The pristine collection from the 1960s and 1970s could net owner Doug Carpenter a packet if they sell at auction today.
Benedict Cumberbatch heads up a group of all-star actors who have shot short films in defence of the Act.
A modified version of the herpes virus has proved a major success in phase III clinical trials.