They were being questioned at Musgrave Police Station in Belfast.
A man and woman arrested in connection with the murder of Michael McGibbon have been released unconditionally.
The father of four died from his injuries after he was shot in the leg in Butler Place in Belfast in April.
Man arrested over threats to elected representatives
By Jonathan McCambridge (PA)
Teachers’ unions welcome pay increase while pledging to tackle workload
By Claudia SavagE (PA)
Minister to explore if he can enforce use of Ulster Banner at Commonwealth Games
By Jonathan McCambridge (PA)
Man charged with rape over alleged sexual assault in Coleraine
By Q Radio News
Domestic abuse calls to police climb over Christmas and New Year
By Claudia Savage (Press Association)
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