Gardai have been granted court permission to keep the prime suspect for the Real IRA murder of gangland godfather Eamon Kelly in custody.
The suspect was arrested by officers shortly after Kelly was gunned down near his Dublin home on Tuesday afternoon.
He was detained under section 30 of the Offences Against the State Act, which allowed gardai to hold him without charge for an initial 48 hours.
The gardai are then obliged to go to court to seek an extension for a further 24 hours. Their application was granted yesterday afternoon by a district court judge.
The 32-year-old man, who is from the Bluebell area of the city, is suspected of being a leading member of a Real IRA group based in the Bluebell-Inchicore district.
A decision on whether the suspect is to be charged with a criminal offence must be made later today.
Last night, officers were awaiting the outcome of forensic tests on a pair of gloves recovered by an officer from the Emergency Response Unit immediately after the arrest and also on the getaway car, a black Lexus, which was found on fire by gardai chasing the killers.
The driver of the car made his escape after a chase near the Clontarf cricket and rugby club, and inquiries into his identity and whereabouts were continuing across the capital.
A post-mortem confirmed that Kelly was shot three times in the chest with a handgun, as he walked towards his home at Furry Park Road in Killester.
The gunman jumped out of the Lexus as his accomplice slowed down, and opened fire.
Gardai are also checking out the recent movements of other suspected members of the terror gang in Bluebell and local criminals, who are associated with them, as well as sifting through statements made by a large number of local people who witnessed the shooting.
The prime suspect has been questioned previously by gardai about a shooting incident in the city but has also served a prison sentence at Portlaoise maximum-security jail for a serious offence.
Gardai believe Kelly's murder is part of an ongoing feud between the terrorists and organised crime gangs in Dublin.
The feud has resulted in several murders and last September claimed the life of Real IRA faction boss, Alan Ryan.
Since then, gardai have been on alert for possible retaliation and a number of anti-crime patrols were circulating in the Clontarf/Killester area when the shooting took place.
Their response led to the capture of the prime suspect.