Dublin's Lord Mayor says it was a dark day for Dublin.
The Garda Commissioner says thousands of hours of video and CCTV footage will be analysed in order to identify people involved in last night's riots.
The scenes followed a stabbing incident in Parnell Square earlier yesterday afternoon, in which a 5 year old girl and a woman in her 30s were seriously injured.
Commissioner Drew Harris insists the Garda response was not a failure.
Minister for Justice, Helen McEntee, expects many more arrests in the coming days.
Dublin Lord Mayor Daithi DeRoiste says it was a dark day for Dublin.

Pilot Found Guilty For His Role In Importing €8.4m Worth Of Cocaine Into Longford
CCPC Reminds Online Shoppers of Refund Rights As Fastway Jobs at Risk
Tirlán’s Age-Friendly Project In Kildare Wins Recognition Award
One Dead, Eight Injured In Crashes Over Bank Holiday Weekend
Gardaí Investigating After Woman's Body Was Found In Meath
Teenager Hit In Face By Firework In Athy Left With Severe Burns
Increased Tolls For M50 And Port Tunnel To Be Introduced In January
Masked Attacker Chases Homeowner Upstairs With Machete In Violent Kildare Town Break-In