DISSIDENT republicans will be prevented from making any military display marking the first anniversary of the murder of RIRA terror boss Alan Ryan.
Teams of gardai are already working undercover to monitor known criminals who might plan a commemoration.
Members of the Special Detective Unit, backed up by plain-clothes members of local stations around Donaghmede and the wider division, have stepped-up security in advance of the September 3 anniversary.
Ryan (32) was shot dead as he walked with friends near his home in Clongriffin, north Dublin.
VOLLEY
There was a national outcry when a volley of shots was fired over Ryan's coffin as it was led from his house for his funeral mass on September 9.
Gardai were strongly criticised for failing to intervene when dissidents dressed in black berets and military clothing fired shots into the air in broad daylight.
Justice Minister Alan Shatter described the funeral display as "reprehensible and absolutely unacceptable".
There was also local criticism when his associates placed black flags on lamp posts around the area and prevented residents from accessing Grange Abbey on the day he was buried.
"Ryan's murder was a very high profile killing and sparked a lot of tension within criminal gangs and subversive sympathisers all over the capital," said one source.
"Now that the first anniversary is approaching there will be a lot of garda activity around north Dublin, and subversives will be monitored just to make sure that a lid can be kept on any potential security situation," they added.
It is expected that plain-clothes gardai will be patrolling and monitoring areas around north Dublin and there will be a more visible garda presence in estates in Donaghmede and Clongriffin over the coming week.
MASSIVE
There have been reports that the 32 County Sovereignty Movement plan a massive march from Ryan's Donaghmede home to his grave on his anniversary next Tuesday.
His murder was organised when a number of the most dangerous gangs in the capital clubbed together after Ryan extorted money from them and engaged in a campaign of violent harassment.
He was killed when two gunmen opened fire on him and one of his associates.
A car carrying what gardai believe were two gunmen pulled up and at least one passenger got out and started firing at Ryan. His friend Aaron Nealis was shot in the leg.
