He was arrested Sept. 15 on two counts of assault with a deadly weapon and taken into custody after being identified in a lineup.
The victims, one 16 and the other 17, have not been identified but are students, one at Village High and the other at Amador Valley High. They were taken by ambulance to Eden Medical Center in Castro Valley, where they underwent surgery. The knife used in the attack may have pierced the liver of one of the victims, it was reported.
Investigators are continuing to search for the motive in the stabbing, which occurred near the campus of Pleasanton's Village High School. The victims were found on the ground outside the school district's graphics art and utility yard in the 4700 block of First Street, near Abbie Street, while high school classes were still in session.
Police were dispatched at 2:15 p.m. and they found the two victims on the ground with stab wounds to their abdomens. Police said that the three, all males, knew each other and the fight was part of an ongoing dispute, possibly over a girlfriend.
The injured teens and other witnesses in the area named the attacker, Police Sgt. Jim Knox said at the time. Authorities worked with school officials to track the suspect to the nearby Civic Square Apartments on Bernal Avenue.
Both victims were reported in stable condition, school officials reported after the attack. Police and counselors were at all Pleasanton schools the day after the stabbing but reported there were no problems.
The Police Department and the school district are looking into the attack and the reasons behind it. Anyone with information is asked to contact the police at 931-5100.