Police remain at the scene of a serious incident in St Johns Street, Launceston.

Police were called to the scene about 10.05am following reports of an armed man threatening members of the public.

The person of interest has received critical injuries and has been taken to the Launceston General Hospital for treatment.

A police officer has received non-life-threatening injuries and is being treated at the Launceston General Hospital.

No other people were injured in the incident and there is no ongoing threat to the wider community.

A crime scene is being established and St Johns Street between William and Cimitiere Streets and Cimitiere Streets between Charles and St Johns Streets remain closed until further notice. Members of the public should avoid the area.