A man arrested in the Republic over the murder of Northern Ireland prison officer David Black has been released.
The 29-year-old was questioned from last Friday night after being detained in Carrigallen, Co Leitrim.
A file is being prepared for the Director of Public Prosecutions.
The release came on the eve of Mr Black's funeral in Cookstown in Mid Ulster.
The 52-year-old was the first prison officer murdered by Northern Ireland paramilitaries for almost 20 years.
A married father of two, he was gunned down by suspected dissident republicans during a high-speed motorway ambush last Thursday as he drove to work at high-security Maghaberry prison in Co Antrim.
Three people have been arrested, and later released, on both sides of the border in connection with the murder.
On Sunday, high-profile republican Colin Duffy, 44, and a second man aged 31 were unconditionally released from police custody in Lurgan, Co Armagh, a few miles from where Mr Black was ambushed on the M1.