A 78-year-old grandfather shot his 26-year-old grandson in a domestic violence altercation Sunday, according to police in Renton, Washington.

Police responded to a reported shooting on Elma Place Northeast early Sunday. According to statements provided by the people involved, the grandson physically assaulted his mother and was acting in a threatening manner toward other family members before the grandfather shot and killed him. The mother is reported to be fine.

>> Read more trending news

It is unknown at this time if drugs or alcohol were involved.

Police are currently investigating.