A man has been arrested by gardaí investigating a murder in Co Louth last year.
Séamus McMahon (41) was shot dead at a property at Bóthar Chroinn, Dundalk, Co Louth, on March 21st.
He died over what was believed to be a personal matter but his death was at the time linked to dissident activity. He was previously charged with being a member of the IRA although he was later acquitted at the Special Criminal Court.
A 30-year-old man was arrested in Drogheda today and is being detained at Drogheda Garda Station under the provisions of section 50 of the Criminal Justice Act, 2007.
He is the third person to be arrested in connection with the investigation.