Bernalillo County sheriff's spokesman Aaron Williamson has said that the motive of the teenage boy who shot dead five people at a home in New Mexico is not yet known, the New York Post reports.
Mr Williamson also said that investigators were trying to determine any connection of the teenager to the victims and if the victims were related.
More top news
After flooding and thunderstorms, a quieter night ahead
Boris Johnson announces funds for troubled country in a bid to stop an influx of illegal migrants and terrorists taking advantage of chaos.
The former US Presidential candidate says her "skin crawled" during her infamous second TV debate with Donald Trump in a new memoir.