A 15-year-old was “accidentally” shot in the buttock at a house in Youngtown on Friday night.
A male youth is in custody and is assisting police with their inquiries into the shooting.
The victim was taken to the Launceston General Hospital to be treated for the gunshot wound.
Police said the teenager is in a stable condition.
Anyone with information about the incident should contact police on 131 444, or by calling Crime Stoppers on 1800 333 000.