A man is in a critical condition and a driver has been charged after a crash in Sydney’s south overnight.

Officers were called to Tyrrell Street in Rockdale at 9.50pm, following reports of a car a crash.

Three 19-year-old males were at the scene when officers arrived, with one trapped inside the Toyota.

Police allege the car was involved in a crash five minutes earlier on Railway Parade in Kogarah, where parked cars had been hit.

The Toyota allegedly drove from the scene without stopping. 

Two were treated by paramedics, with one taken to St George Hospital where he remains in a critical condition.

A second man was in a serious but stable condition.

The third man, the alleged driver, took a breath test at the scene which allegedly returned a positive result.

He was taken to the same hospital for mandatory testing before being taken to Kogarah Police Station where he underwent a second breath test.

He allegedly blew a reading of 0.203.

He was charged with aggravated dangerous driving occasioning grievous bodily harm, causing bodily harm by misconduct and a drink driving offence.

He has been refused bail and will appear in Parramatta Local Court today.

Anyone with dashcam footage of the area at the time is urged to contact police.