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.
Little-Pengelly leads mission to showcase NI in Washington on St Patrick’s Day
By Rebecca Black (Press Association)
Psychiatrists warn of ‘workforce crisis’ facing NI mental health services
By Jonathan McCambridge (Press Association)
Messages between Natalie McNally and murder accused ‘had no trace of argument’
By Jonathan McCambridge (Press Association)
Financial help for households reliant on heating oil – who is eligible?
By Josie Clarke (Press Association Consumer Affairs Correspondent)
Police probe deaths of 13 lambs with ‘deliberately broken’ necks
By Gráinne Ní Aodha, Press Association
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