Mary Lou McDonald says she has no confidence in the Justice Minister, the Garda Commissioner, or in how Dublin is being policed.
The Sinn Féin leader says she has spoken with both Helen McEntee and Drew Harris about the "unacceptable failure to keep people safe last night."
She adds "everyone who participated should hang their heads in shame" for what they brought upon the capital and its people, and they should "face the full rigours of the law."
Meanwhile, The Taoiseach says the country will need stronger laws to tackle hatred on social media following unrest in the capital last night.
The violence came after a stabbing at a school at Parnell Square East which left a 5-year-old girl in a critical condition, and three others injured.
The Taoiseach says those involved "brought shame on Dublin, brought shame on Ireland, and brought shame on their families and themselves."
Leo Varadkar adds stronger penalties for hatred on social media are needed:
The GRA says a number of Gardaí suffered injuries and assaults, some of which are quite serious.
The association is commending its members who worked in an extremely volatile and dangerous situation.
President of the Garda Representative Association, Brendan O'Connor, wants to see proper resourcing: