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A student participating in an after-school program at Bubb Elementary was injured by a youth with a knife on March 11. Photo by Zoe Morgan.

A 10-year-old boy with a knife stabbed a 7-year-old student who was participating in an after-school program at Bubb Elementary School in Mountain View on Wednesday afternoon.

The suspect, who does not attend Bubb and is not affiliated with the after-school program, approached the student near the baseball field and cut them on the shoulder with a knife, Mountain View Whisman Superintendent Jeff Baier said in an email to families. The student who was injured is “expected to be okay,” Baier added. 

Following the incident, staff immediately called the police. When police arrived on scene, they found a 7-year-old victim with three “stab wounds” and recovered a kitchen knife believed to have been used in the attack, according to a Mountain View Police Department press release sent Thursday afternoon. Firefighters treated the injured child at the scene and released them to a parent. 

The suspect had fled Bubb’s campus before police arrived, but he was later detained at his residence after a Los Altos Police Department K-9 unit helped track him, the press release said. The 10-year-old has been transferred to the custody of clinicians from Pacific Clinics, a youth mental health services provider. 

Other students participating in the after-school program saw the incident happen, leading on-campus mental health staff to provide support. The school will continue to offer counseling services for students, Baier said. 

“We are relieved that the injured student is recovering, and we continue to keep the student and their family in our thoughts,” Baier wrote in a follow up email on Thursday. “Our priority now is making sure our students and staff feel safe, cared for and supported at school.”

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Emma Montalbano joined the Mountain View Voice as an education reporter in 2025 after graduating from Cal Poly, San Luis Obispo, with a degree in journalism and a minor in media arts, society and technology....

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