It has been broadcast that the bags contained a head and severed limbs.
A se rate bag ground 32km away in the Fonthill area of Dublin has also been uncovered.
The Act reports that one of the bags contained a femur, a left foot, two red stones and a steel rod.
Tests on the head are being carried out which should be masterly to tell investigators whether Mr O’Brien was stabbed, shot or even strangled in advance of he was dismembered.
rt of a heavy industrial cutting contrivance has also been discovered by divers from the Garda Water portion.
It is believed to be the body of a power cutting tool but does not contain any knives or saw.
It is now being forensically examined.
The latest find comes as gardai zone in on the place where the father-of-one was gruesomely murdered.
Investigating officers have give an account ofed the Carton and Sallins finds as significant and said they would antici te a significant boost to their inquiries.
Senior gardaí have sustained that an extensive line in their investigation into the murder of Mr O’Brien is gangland vocation.
Chief Superintendent Barry McPolin, of the Kildare Division, said he was write off with progress of the investigation.
“We have a very large number of detectives from Kildare conflict, supported by both national and regional units, working hand in connivingly and it is our speed and determination to bring the perpetrators of this brutal murder to detention and before the courts,” he said.
“We will treat every iota of word that we receive with the strictest of confidence.”
He added that foregoing murders of a similar nature were also being reviewed by the inquest team.
“Quite obviously, as rt of the several lines of inquiry, we desire be looking at other murders to see are there links and any similarities,” he put.
Superintendent Gerry Wall of Leixlip Garda Station said the search was wide-ranging.
“It has extensive lines of inquiry and information. As with any murder exploration, we follow every line of inquiry with a slow methodical dispose of.
“That (gangland) could be an aspect of it and we will certainly look at that during our searches,” Supt Wall said.
The senior garda said the O’Brien folks were understandably “very stressed during a traumatic time”.
“They are durable a very seriously stressful time in their lives that no person would wish on anyone to suffer or endure. They’ve lost a loved one, a son, a wife, a father, a brother, a cousin. It is indeed a very traumatic time for them,” he suggested.
Garda divers searching the Grand Canal
He revealed that gardaí secure so far followed over 300 lines of inquiry during the murder inquest and continued to appeal for anyone with information to come forward. One theory being looked at is that the founder of one became involved with criminals with whom he grew up in west Dublin.
A well-spring explained that Mr O’Brien was persuaded by an organised crime outfit to ovation over cash to fund a drug-dealing network with the promise of a wealthy return on his investment.
“It appears that this gang persuaded him to purposes with big cash sums on the promise of a return on his investment.
“This may rtake of worked out once or twice before but something went wrong along the way this in good time always,” a source said.
“Kenneth was not a gangster. He wasn’t into numbs or violence, but he was taken advantage of by people who grew up around him and knew he was approving money in Australia,” they added.
“He got into something he brainstorm he could handle.
“He thought it was the quickest way to turn a profit on his money and attend to arrange for for his family’s future but something went wrong somewhere.”