DOUGLASVILLE (AP) - Douglas County officials say a 14-year-old is in custody after his 77-year-old great-grandmother was stabbed to death with a sword and his grandmother was wounded.

Douglas County Sheriff Phil Miller says officers arrived at the home Monday afternoon and found the grandmother, who is in her 50s, barricaded inside a room and the great-grandmother on the ground outside.

They say the teen was standing in the doorway with what they described as a full-sized sword and a pellet rifle, and that he shot out the windows of a patrol car.

Authorities say police used a Taser to take the teen into custody after a standoff. The grandmother was taken to a hospital for treatment of what officials describe as non-life threatening injuries.