Masked men were captured on video firing a volley of shots into the air following the death of INLA child killer Martin McIlkerney.
The 57-year-old died in hospital on Friday, May 17 after sustaining a gunshot wound in Milltown Cemetery.
The PSNI said today that the male was arrested in the Newtownabbey area last night (Friday 24 May) on suspicion of membership of a proscribed organisation.
He is being questioned at the Serious Crime Suite at Musgrave Police Station.
The investigation into this incident is ongoing and Police continue to appeal to anyone with information to contact police on 101.
Alternatively, information can be provided anonymously by contacting the independent charity Crimestoppers on 0800 555 111.
McIlkerney was released from prison in 2000 under the terms of the Belfast Agreement.
He was handed three life terms for his role in the murders of school boys Kevin Valliday, Stephen Bennett and soldier Lance Bombardier Kevin Waller.
The three died when a bomb planted by the INLA exploded at the Divis Flats complex in 1982.