Those involved in Dublin's gang-related feud have been urged to take stock and to see "that one life after another is not going to solve anything".
Assistant Garda Commissioner John O'Mahoney also appealed to people to come forward if they have information and said it would be dealt with in a confidential manner.
He was shot at the Sunset House pub in Summerhill last night.
The Assistant Commissioner also said there was an armed Garda patrol around the corner from where last night's murder in Summerhill took place.
Gardaí face challenges, he said, but added that on a regular basis officers are preventing murders.
"One life after another is not going to solve anything" - Assistant Garda Commissioner John O'Mahonyhttps://t.co/FlijCj8GY7
— RTÉ News (@rtenews) April 26, 2016
Meanwhile, former Lord Mayor of Dublin Christy Burke called on the Garda Commissioner to provide more community based gardaí in Dublin's north inner city and to re-open Fitzgibbon and Cabra garda stations.
Speaking on RTÉ's News At One, he said: "I'm calling on the commissioner to provide community based gardaí in order to secure the minds of families.
"Open Fitzgibbon Street and Cabra garda stations. Put community guards on the ground.
"I'm not expecting armed guards on every street corner but if you can't bring the perpetrators to justice, bring the communities to security and have garda presence on the ground and that's what's needed."
Mr Burke said everyone needs to work together in order to bring an end to the killings.
He said he knew of people who would be willing to mediate on both sides in order to bring peace to the area.
Local families are terrified, he said, saying that he knew of at least four families who requested a move out of the area this morning. He said he had no doubt that more would follow.
Archbishop Martin: Communities held to ransom by 'people involved in the rackets of death'
Catholic Archbishop of Dublin Dr Diarmuid Martin has said the city needs a courageous coalition of strong people who are not afraid to name violence as the evil that it is.
Dr Martin said society needs to create a culture that will enable those with "plentiful intelligence on the streets" to get it to the Gardaí.
In a statement, Dr Martin said: "We have to unite to undermine them and their business and not close our eyes to what we know.
"We need to form a strong alliance of all those who oppose violence on our streets. We cannot abandon the good honest men, women and children of parts of our inner city," he said.
"The elderly live in fear. Their children are exposed to carnage on their streets. Their neighbourhood is being vilified; they are held to ransom by despicable people involved in the rackets of death."
Fear and tension following Dublin murder - McDonald
Sinn Féin Deputy Leader Mary Lou McDonald said there was a heightened sense of tension, fear and vulnerability following the murder.
The Dublin Central TD said people who live in the area are frightened.
Speaking to RTÉ’s Today with Keelin Shanley, she said that garda numbers in Dublin's inner city are down by over 100.
"That has an effect and there is no point in pretending otherwise," said Ms McDonald.
"There comes a point where this austerity mantra runs out of rope and I think it has run out of rope in an awful, vicious and very stark fashion."
Earlier, Independent councillor Niall Ring called for more resources to be given to gardaí in order to tackle gang-related crime.
Mr Ring warned that the introduction of an armed support unit in June will come "too late".
Speaking to RTÉ’s Morning Ireland Mr Ring, who was in the Summerhill area last night, said: "Whatever resources are needed to give the gardaí absolute control, absolute information - whatever they need, equipment etcetera to has to be given.
"It has to be given now. This 55 armed support unit in June.
"June is too late. By June more people may have been murdered."
Archbishop of Dublin Diarmuid Martin issued a statement condemning the continued violence in the city.
He said: "We need to form a strong alliance of all those who oppose violence on our streets. We cannot abandon the good honest men, women and children of parts of our inner city."
Archbishop Martin called on the public to help gardaí track down the perpetrators.
"There is plenty of intelligence on the streets; we need to create a culture which will enable those who have information to get that information to the Gardaí," his statement said.
