A 22-year-old woman has died at the Royal Darwin Hospital following an alleged domestic violence incident in Palmerston on May 21, NT Police said.

Police said a report will be prepared for the coroner as the Major Crimes unit continues its investigation into the circumstances surrounding her death.

A 22-year-old male suspect was arrested and charged with aggravated assault after the alleged domestic violence incident on May 21 and appeared at the Darwin Local Court on May 26 to face the charges.

Police did not say if he had been bailed or remains in custody.

Police earlier reported that at about 8 pm on May 21, the Joint Emergency Services Communication Centre received a report that an incident was unfolding at a residential address in Johnston, with a male assaulting a female known to him.

“Neighbours, upon hearing the disturbance contacted triple zero and rendered assistance and provided first aid prior to St John Ambulance and police attending,” police director of communications Mark Wilton said.

Mr Wilton said the victim was conveyed by St John Ambulance to Royal Darwin Hospital in a critical condition.

The cause of death is yet to be determined.

Police have thanked neighbours for helping the woman and are asking for anyone who saw the assault to call them on 131 444, quoting reference number P25138375.

If you, or someone you know, are experiencing difficulties due to domestic violence, support services are available, including, but not limited to, 1800RESPECT (1800737732) or Lifeline 131 114.