A MAN is in a critical condition in hospital after he was shot by a NSW police officer in the state's south.

Police say the 22-year-old man was shot in the chest by a senior constable on Short Street at Bowral about 6am today.

Police say the shooting occurred after the man made threats against a number of officers.

They'd been trying to negotiate with the man at the time of the shooting.

The man was taken to Liverpool hospital where he is in a critical but stable condition.