A teenager from north-west Sydney is in a critical condition after a suspected game of Russian Roulette.

Police were called to Eldon Street in Pitt Town regarding a gunshot wound to the head at around 6.30pm Friday.

19-year-old Josh Taylor was in the driver’s seat of a Commodore outside the Pitt Town IGA Supermarket when he pulled the trigger of a Smith and Wesson gun, and the single bullet was fired on the first shot.

Police are still investigating the circumstances, but three teenagers in the car allegedly told investigators he was playing a game of Russian Roulette.

He was rushed to Westmead Hospital where he remains in a critical condition.