The road was closed for a time to allow Forensic Collision Investigators to conduct a technical examination.
George's St has since re-opened fully.
Gardaí are appealing for any witnesses to this collision to come forward. Any road users who were travelling in the area at the time and may have camera footage (including dash-cam) are asked to make this footage available to investigating officers.
Anyone with information is asked to contact Pearse Street Garda Station on 01 666 9000, the Garda Confidential Line on 1800 666 111, or any Garda Station.