20 extra gardai are to be drafted into the Organised Crime Unit, bringing its strength up to 70.
There will also be an increase in armed patrols and checkpoints in targeted areas involving the Emergency Response Unit and the Special Detective Unit, while intelligence-led operations will be intensified.
The announcement follows the shooting dead of 26-year-old Gerard Byrne in central Dublin last night.
He became the sixth person in six days to have met a violent death.
Earlier, the Archbishop of Dublin, Diarmuid Martin, strongly criticised what he said is a culture of violence that is beginning to devastate areas of Dublin.
In a statement, Archbishop Martin said such violence cannot be justified or tolerated.
Fine Gael and Labour have called for Dáil time to be set aside to discuss law and order.
Public concern over killings
The Tánaiste and Minister for Justice, Michael McDowell, has described the latest series of gun-related killings as serious and said he did not underestimate the public's concern about it.
Speaking on RTÉ Radio's Morning Ireland, Mr McDowell said he wanted courts to fully implement the law tightening up the bail procedure for people in relation to arms and drugs offences.
He said that all the arms of democracy needed to be used against violent criminals and said the crime problem was not down to a lack of garda resources.
Also on the programme, Fine Gael's Justice Spokesman Jim O'Keeffe claimed law and order had broken down and the country was in a virtual state of national emergency.
He said a response like that which followed the murder of Veronica Guerin was needed from the Government.
Labour's Joe Costello said the incident, which occurred in his constituency, was 'an absolutely shocking development' that he feared could lead to more attacks, reprisals and deaths.
Mr Costello said there was a need for the Taoiseach, Bertie Ahern, to take personal charge of this situation before more lives are lost.
Meanwhile, Fianna Fáil Senator Cyprian Brady called on gardaí and the army to come together to round up the drug barons and murderers who he claimed were 'reducing Dublin to a bloodbath'.
