Three men and a woman have been arrested in connection with the murder of a well-known gangland figure in Dublin in early 2009.
Graham McNally (34), Cappagh Avenue, Finglas, a member of a major Dublin drug gang once led by murdered drug dealer Martin “Marlo” Hyland, was shot in the head at Cold Winters in Finglas on January 20th 2009.
It is believed Mr McNally was shot dead as part of an internal gang dispute.
McNally's brother Alan McNally was shot dead in the Cappagh Nua pub, Barry Road, Finglas earlier this year.
The four people currently being held at Finglas, Blanchardstown and Cabra Garda stations, were all arrested in the Finglas area at about 9am.
The four, who range in age from their late 20s to mid 40s, are all being detained under Section 30 Offences Against the State Act, 1939.
Four people were previously arrested in relation to McNally's murder in 2009.
No-one has been charged to date in relation to the murder.