A 15-year-old boy has been arrested following the violent invasion of an elderly couple's home south of Brisbane.
A 93-year-old man was punched in the face and he and his 91-year-old wife were threatened with a knife during the robbery.
Police say two males broke into the couple's home at Inala, south of Brisbane, about 9.30pm (AEST).
One was armed with a knife and wearing a balaclava.
The thieves grabbed some property from the Hickory Place house before fleeing.
