Northern Territory Police are calling for witnesses following a serious assault incident in Darwin City overnight.

Between 9pm and 9:40pm, a 39-year-old male was allegedly assaulted with an edged weapon by his partner.

St John paramedics treated the male at the scene before transporting him to Royal Darwin Hospital, where he remains in a critical but stable condition.

Detective Senior Sergeant Justin Bentley said, “The Domestic and Family Violence Section are investigating the alleged assault.  

“If anyone was in the vicinity of the corner of Smith Street and Daly Street, and Geranium Street and Stuart Highway in Stuart Park, between that time, is urged to contact police on 131 444. Please quote reference number 9699796.”