Police were called to a house after two brothers got into an argument over a video game.
Officers arrived at the scene in Plymouth, Devon on Wednesday night when a dispute between the adult siblings escalated.
It is believed the argument started when one of the brothers killed the other's character while playing popular video game Grand Theft Auto (GTA).
Devon and Cornwall Police said the incident was "dealt with at the scene".
A spokesman said: "Police were called to an address in the Whitleigh area of Plymouth at around 5.30pm yesterday following a domestic incident.
"It appears that there was an argument between two brothers who fell out after playing the computer game Grand Theft Auto."
Grand Theft Auto is an action-adventure game, noted for its violence and role play.