A man has been arrested after the attempted murder of gang boss Christy Keane.
The man, who is in his 30s, was arrested late last night in the Limerick area.
He can be held for up to seven days without charge.
Meanwhile, it has emerged that the shooting of gang boss Christy Keane was "most likely" ordered by associates of his murdered one-time enforcer Eddie Ryan.
Keane (55) was blasted four times in the chest and arms by two masked men who opened fire with automatic handguns as he walked to a gym in his native Limerick.
The incident happened at the University of Limerick Sports Arena at 6.40am yesterday.
This morning a man in his 30s was arrested in connection with the investigation.
The male was arrested last night in the Limerick area and he is currently detained at Henry Street Garda Station.
The gunmen fled the scene and two burnt-out cars were found nearby.
Last night sources said gangster Keane was in a stable condition and had been able to be interviewed by gardai.
The Herald understands that gardai believe the attack was organised by members of the gang controlled by Ryan's two sons - Edward and Kieran - who have sworn vengeance for their father's murder in November 2000.
Eddie Ryan was once a close ally of Christy Keane, but they had a massive falling out.
He tried to shoot Keane but his gun jammed. The incident happened two days before Ryan was shot dead in the Moose Bar in Limerick city centre.
The murder was carried out by Keane's brother, Kieran, and another associate, Philip Collopy, both of whom have also died violently.
Extra armed gardai were again being deployed on the streets of Limerick last night to prevent another outbreak of the gang warfare that claimed more than 20 lives over 10 years.
There was concern that Keane's gang will seek revenge for yesterday's shooting.
"This will not be taken lying down by these boys. It is a potentially dangerous situation but it will not be allowed get out of hand," a source said.
The gunmen in yesterday's attempted murder are believed to have fled the scene in a red 132-D registered Ford Focus which was found burnt-out in Monaleen. It is understood they changed cars to a white V70 Volvo Estate with a UK reg which was later found burnt-out in Drombana outside the city.
The hit team may have purposely burned the car there as it is the same spot where Kieran Keane was murdered by the Dundon/McCarthy/Ryan gang in 2003.
Christy Keane was said to have been lucky to survive the attack.
"This was well-planned and it is clear that they intended killing Christy. He was very lucky that he survived and that was due to his level of fitness," a source said.