A 16-year-old Bethlehem boy is being charged as an adult after he allegedly stabbed another teen-ager three times during a fight after they got off a school bus in the South Side on Monday afternoon, police said.

Zachery Ortiz of 940 E. Fourth St., is accused of taking a knife and stabbing the 17-year-old twice in the left shoulder and once in the chest, according to court papers. The 17-year-old was alert after the attack, but did require treatment at St. Luke’s Hospital in Fountain Hill, the arrest warrant said.

The fight began at about 3 p.m. after the two teens got off of the bus at E. Fourth and Hayes streets, according to court papers. The origin of the fight was a comment one teen made about a member of the other’s family, according to a police media report on the incident.

The arrest warrant said Ortiz admitted to police that he stabbed the other teen.

Ortiz was charged with aggravated assault with a deadly weapon, which is a second-degree felony, simple assault, recklessly endangering another person and disorderly conduct. He was arraigned in front of District Judge Patricia Romig-Passaro and committed to Northampton County Prison in lieu of $25,000 bail.