Low-level drug dealing is enough to get you killed, Assistant Garda Commissioner Pat Leahy warned in a plea to young people not to get involved in the drugs trade on any level.
Mr Leahy was speaking after the murder of two 22-year-old men - Sean Little and Jordan Davis - in the capital within 17 hours of each other.
"We are really appealing to the young people who are out there at the moment, not only in our city of Dublin but across the country, please do not get involved at any level with the drugs trade," he said.
"We consistently hear comments like 'He's only doing a little bit of low-level dealing' or 'He's only taking a little bit of gear here and there', but what we are saying to the public and to parents, and to young men and women, is please, please, please do not get involved at any level.
"Low-level dealing now is enough to have your life taken at a young age, and we have seen it time and time again across the city over the last number of weeks and years."
Speaking about the two latest murder victims, he said it was difficult to even term them young men at the age of 22 because they were really only just coming out of their teenage years and all of a sudden their lives had been taken unceremoniously.
"In relation to the two events we have had this week, I'm really saying to the public and the communities that have been affected by this, thank you very much for the engagement and the commitment that you have shown in giving us the information that we need to pursue these incidents," Mr Leahy said.
"However, we know that there are people in the community [in Darndale] who know some information around that particular incident.
"We know that the red mountain bike that was involved in this was in there on the days preceding the killing, and we also know that it was there in the hours preceding it.
"So there are people in the area that know something about this that haven't yet come forward, so we would encourage them to come forward.
"We will be very sensitive in relation to any information that we receive.
"In relation to the incident on the M1 at junction five, we are looking for some assistance.
"We are appealing for people that have a dashcam in their car, or if you were out there between 10pm and midnight on Tuesday, please, we would like to hear from you.
"Anyone driving north or south on the M1 over that period, we would like to hear from you because we know that the car that was involved was out there around that time.
"We are not sure if it went north or south, so we are looking for people who were in the area to come forward with information."
Asked if young men being involved is reflective of a generational change partly because gardai have had success in dealing with older previous gang members, the assistant commissioner said it was possible.
"We've been dealing with a pretty seri- ous feud which has strong international links over the last few years," he said.
"We've been very successful in that regard, and lots of the people that were involved in the top tier of that have been convicted of murder and attempted murder and conspiring in other ways.
"A lot of them have left the country at this point in time, which has probably left a bit of a void in terms of who is going to continue the trade.
"So we do see younger people getting involved in that vacuum that has been created.
"I suppose an unintended consequence of that is that people who are living in communities are seeing younger people with access to money and access to cars and access to women and access to everything that goes with more funding from the drugs trade.
"One of the outcomes of this is that you don't get to live a full life."