Two men and a woman were still being questioned early today in relation to the murder of Mr Thomas Nevin in his Co Wicklow pub in March last.
Gardai in Enniscorthy, Co Wexford, were questioning two men arrested in Dublin yesterday morning, and a woman from the Arklow area who was arrested on Saturday evening.
Three men arrested on Friday in the Dublin area, in relation to the same investigation, were brought to Enniscorthy for questioning. One was released on Saturday night, and the other two were released yesterday.
The mea and woman are being detained under Section 30 of the Offences Against the State Act, under which a person can be held for up to 48 hours.
Mr Nevin was shot in his pub, Jack White's, near Brittas Bay, Co Wicklow, on March 19th. Between £10,000 and £15,000 was taken from the pub safe.
Gardai say robbery may have been the motive but they are also investigating the theory that the murder may have been a so called contract killing.