Two men arrested in connection with the murder of father of two Roy Collins could be held in custody for a further two days.
The suspects who were arrested shortly after the shooting last Thursday were still being questioned tonight under Section 50 of the Criminal Justice Act, which allows gardaí to hold them for up to seven days.
Gardaí will have to go to court before lunchtime tomorrow if they wish to detain the men for the final 48-hour detention period allowed under the 2007 Act.
Sources indicated tonight that gardaí could make this application at Limerick District Court tomorrow morning.
Results from forensic samples, seized as part of the massive inquiry, are still being awaited and so far the firearm used in the murder has not been recovered.
Gardaí believe the father of two was shot once in the chest with a 9mm Glock pistol and a post mortem revealed an exit wound in his back.
Searches continued yesterday in the Rosbrien area of Limerick close to where the stolen black Mercedes Benz used by the gunmen was found partially burnt out.
It's believed the firearm may have been dumped in this area.
House to house inquiries also continued yesterday on the south side of the city as part of the investigation, which is being carried out by up to 100 gardaí from across the southern region.
Members of the National Bureau of Criminal Investigation are also involved in the inquiry and Assistant Garda Commissioner Kevin Ludlow who attended Mr Collin's funeral today, said progress in the inquiry was steady.
The Assistant Commissioner has vowed that gardaí will win the battle against criminal gangs and described the response of the public to date as "fantastic".
Mr Collins, who was due to get married in June, was shot shortly after midday last Thursday, at his business premises the Coincastle amusement arcade whch is located next door to the Steering Wheel pub owned by his father at the Roxboro Shopping Centre.
Gardaí suspect members of the McCarthy Dundon criminal gang targeted the father of two in a revenge attack.
The dead man's first cousin, Ryan Lee, gave evidence against Wayne Dundon who threatened to kill him in December 2004 when he refused to allow Dundon's 14 year old sister into Brannigan's pub in Limerick which is also owned by the Collins family.
Ryan Lee was shot 30 minutes later by a lone gunman who entered the pub wearing helmet but nobody has ever been charged with the shooting.
Wayne Dundon was subsequently convicted of threatening to kill Mr Lee and jailed for ten years, but the Court of Criminal Appeal later reduced his sentence to seven years.