Detectives in Launceston are investigating a robbery in a hotel car park at Prospect last night.
Police were called to the scene shortly before 10.30pm, after a man reportedly approached a vehicle in the car park and threatened the two occupants with a knife.
The man fled on foot after acquiring a wallet from one of the people in the car. No one was physically injured during the incident.
A woman has been arrested and detectives are following a specific line of enquiry in relation to other people they believe are involved.
Anyone with information about the incident is asked to contact Launceston CIB on 131 444. Information can also be provided to Crime Stoppers anonymously on 1800 333 000 or at crimestoppertas.com.au