Gardai are questioning two men they believe are members of the gang that ordered the murder of Real IRA terrorist Alan Ryan.
The pair, one in his late 20s and the other in his late 30s, were picked up in the Coolock area of Dublin, are not suspected of having pulled the trigger, but they are believed to have information on the killing of the 32-year-old paramilitary boss.
The men were arrested yesterday and are being held at Coolock garda station under anti-gang laws. They can be questioned for up to seven days.
Ryan was shot dead on September 3 while walking in Grange Lodge Avenue, Clongriffin, north Dublin.
He was under investigation on both sides of the Border and was linked to a murder believed to have been organised by the Real IRA faction in Derry.
Since Ryan's murder, a garda clampdown against members of organised crime gangs has been under way.
Earlier this month the operation was intensified when nine arrests were made throughout Limerick.
The suspects were alleged to be relatively minor figures in the Limerick area Real IRA and did not include the outfit's senior two activists in the region.