Authorities in New Mexico have identified a gunman that killed three and injured six others in Farmington as 18-year-old high school student Beau Wilson.

The teenager was armed with three weapons including an AR-15 rifle when he began shooting randomly at cars and houses in New Mexico town of Farmington on Monday, authorities said.

He was killed by police after injuring two officers, Farmington Police Chief Steve Hebbe said in a released video on Monday evening.

Police said the three victims included an elderly mother in her 90s and her daughter, who was in her 70s. The third victim was also in his 70s.

The assault weapon had been purchased legally and belonged to a family member of the suspect, police said.

Breaks more to come