(Newser) – Authorities in New Mexico say a 15-year-old boy has fatally shot two adults and three children inside an Albuquerque home. The boy has been booked on murder and other charges. A Bernalillo County sheriff's spokesman says the boy's motive and connection to the five victims are unknown; KOB TV reports that they were a man, woman, two girls, and a boy. Multiple weapons, including an assault rifle, were reportedly found on the scene, and the victims had several gunshot wounds. Investigators who received a report of the shooting last night are trying to determine whether the victims were related. The victims' identities haven't been released.