The boys are believed to have suffered stab wounds during a public order incident close to Blanchardstown shopping centre.
Gardaí say the incident occurred at approximately 5.40pm on Wednesday.
The victims received treatment at Temple Street Children's Hospital. Their injuries are said to be non-life threatening.
Gardaí are examining a number of locations as part of their investigation into the incident. They have requested that anyone who was in the vicinity of Blanchardstown shopping centre and may have captured the incident on mobile phone footage to come forward. They are also interested in any motorists who may have dash cam footage of the incident.
Anyone with relevant information should contact Blanchardstown Garda Station on 01 6667000, the Garda Confidential Line on 1800 666 111, or any Garda Station.
