A woman has died after being shot by police in Melbourne’s northeast.

The officers were called to reports of one woman assaulting another woman at an address in Lower Plenty about 6.30pm on Friday.

Victoria Police say members were challenged by a woman who was armed with a knife.

One woman was shot dead by police and another woman was treated by emergency responders but died at the scene.

Detectives are not looking for anyone else over the incident and believe the two women knew each other.

The homicide squad is investigating.

The probe will be overseen by Professional Standards Command, which the force says is protocol when a police firearm is discharged.

–AAP