Gardaí are appealing for witnesses to the incident which happened on R610 at Raffeen, Carrigaline at approximately 9.15pm.
All three folk engaging with the break had been taken to Cork University Well being facility.
The driver of the first car, a 34-year-outdated skool man, is in serious situation while the second male driver (56) and 17-year-outdated skool male passenger are being handled for nonlife threatening accidents
The avenue is at demonstrate closed as gardaí investigate the scene. Local diversions are in space.
Gardaí are appealing for somebody who changed into as soon as travelling on the R160 at Raffeen, Carrigaline, Co Cork between 9pm and 9.15pm on Saturday night or somebody who changed into as soon as within the residence and will uncover witnessed the collision, particularly any avenue customers with slither cam footage, to contact Togher Garda Impart on 021 4947120, the Garda Confidential Line 1800 666 111 or any Garda Impart.