The collision occurred around 19:00 on 3 January on La Grande Route De St Martin at the junction with Rue Du Ponterrin, in St. Saviour.
A Grey Peugeot RCZ, A Blue Ford Fiesta Zetec and Black Ford Focus Zetec were involved.
One of the drivers was taken to A&E following the accident and the main road was completely closed while emergency services were on site.
Police would now like to speak to anyone who may have seen the collision or who may have captured any video footage of the incident.
The Fire Service shared images of the accident on social media.
Anyone with any information is asked to contact police on 612612 or anonymously via Crimestoppers on 0800 555 111.