A suspected murder-suicide in Canoga Park in the San Fernando Valley left a father and his twin 10-year-old sons dead.

Police responded to a home on Owensmouth Avenue around 7:15 p.m. Sunday, where they found the victims and grieving relatives outside.

Witnesses and neighbors described scenes of intense grief as family members reacted to the tragedy.

Investigators spent hours processing the home and collecting evidence while working to determine what led to the killings, the New York Post has reported.

The incident drew a large police presence and left the local community devastated as residents sought answers.