Sixteen people have been arrested and three imitation guns seized in dawn raids following a Real IRA show of strength at the funeral of one of its key figures in the Irish Republic.
The 15 men and one woman were detained in homes in Dublin, Kildare and Meath as part of Operation Ambience targeting dissident republicans.
Gardai later said a teenager was arrested on Thursday afternoon in a connected raid. He has been detained under section 30 of the Offences against the State Act 1939 in Dublin. A spokesman said further searches were carried out during the day at a house and an industrial unit.
Gardai swooped on homes across three counties from 6am in response to a paramilitary colour party opening fire over Ryan's Tricolour draped coffin outside his north Dublin home.
The 32-year-old gang boss, who had links to extortion rackets in the capital, was murdered in broad daylight on Monday September 3 in Clongriffin. More than 200 gardai were drafted in from several units to carry out the raids in 30 locations. As well as the replica guns, mobile phones and computers along with documentation were taken from homes.
The 16 people with suspected dissident republican links are aged from 20 to 60 years old. They were being questioned under section 30 of the Offences against the State Act, 1939 which allows detentions in relation to gun offences and terrorism.
Gardai said the raids were in response to the possession and discharge of firearms and dissident republican activity.
"Gardai continue to examine a number of lines of inquiry and are fully committed to maintaining law and order and are resolute in their determination to fully investigate any breaches of the criminal law that occurred in Donaghmede, Dublin 13 on 8th of September," a Garda statement said.
Scores of dissident republican supporters attended Ryan's funeral in the Grange Abbey Drive area of north Dublin. Black flags were hung from lampposts for several days.
A number of men wearing white shirts and black trousers and ties carried Ryan's coffin after a volley of shots was fired over it by masked men at the house. Mourners attempted to shield the gunmen from onlooking gardai and cameras as they changed out of combat gear and scarves in a van at the home.