A man has being seriously injured following a crash North of Bungendore overnight.

Just before 4am NSW Emergency Services responded to reports of a motor vehicle crash on Tarago Road about 10km North of Bungendore.

NSW Ambulance Service paramedics treated the male passenger at the scene before he was taken to Canberra Hospital in a serious but stable condition.

The male driver was taken to Queanbeyan Hospital for mandatory testing.

A crime scene was established and the incident if being investigated by officers from the Crash Investigation Unit.

Anyone with information, or any available dashcam/mobile phone footage, are urged to contact Queanbeyan Police Station or Crime Stoppers on 1800 333 000.