San Ramon Valley High School was placed on lockdown for approximately 30 minutes late Tuesday morning while Danville police investigated a threat of violence reportedly made by one student against another.
The lockdown was lifted shortly after police officers found the culprit, identified as a 16-year-old Alamo boy, about a block away from campus, according to Danville police chief Steve Simpkins.
"We had reason to believe that the threat against the student was credible enough to warrant the district placing the school on lockdown. In a situation of that sort, it is best to be cautious," Simpkins said in a statement.
Officers were dispatched to the high school at 501 Danville Blvd. at 11:19 a.m. Tuesday after the campus's school resource officer learned of a threat of violence by one student against another student, Simpkins said.
The San Ramon Valley school district ordered a lockdown of the high school at 11:30 a.m. while police searched for the student who made the threat, according to the police chief.
"The safety of our students is our top priority, and we take every incident seriously," said district communications specialist Meaghan Krakoff, who noted that no other schools were affected by the lockdown.
The 16-year-old boy, whose name was not released, was detained after being located at Big O Tires on Linda Mesa Avenue about 30 minutes later, according to Simpkins. The teen had no weapons at the time, according to police.
The lockdown was lifted around noon Tuesday, according to school and police officials.
The incident remains under investigation, and police have not decided whether to charge the teen, Simpkins said Tuesday afternoon.