10-Year-Old Stabs 7-Year-Old Girl at Wealthy California School

Got story updates? Submit your updates here. ›

A 7-year-old girl was stabbed three times in the shoulder by a 10-year-old boy on the playground of Bubb Elementary School in the affluent Silicon Valley neighborhood of Mountain View, California. The school was placed on lockdown as police pursued the young suspect, who was eventually detained at his home. The 7-year-old victim was treated at the scene and is expected to recover, while the 10-year-old boy was transferred to a juvenile mental health services provider.

Why it matters

Incidents of violence involving young children are extremely rare and concerning, raising questions about the boy's mental state and access to weapons, as well as the safety protocols in place at the prestigious school located in one of the wealthiest areas of the San Francisco Bay Area.

The details

According to police, the 10-year-old boy used a kitchen knife to stab the 7-year-old girl three times in the shoulder on the Bubb Elementary School playground. The boy then fled the scene, prompting a police chase through the upscale Mountain View neighborhood before he was apprehended at his home with the help of home surveillance footage and a K-9 unit. The 7-year-old victim was treated at the scene by the Mountain View Fire Department before being released to a parent, while the 10-year-old suspect was transferred to juvenile mental health services.

• The incident occurred on March 11, 2026.
• The school was immediately placed on lockdown following the attack.

What they’re saying

What’s next

The 10-year-old suspect will undergo a mental health evaluation to determine if he should be charged or receive other intervention.