Lockdown Lifted At Grossmont High School In East County

EL CAJON, CA – A lockdown has been lifted at Grossmont High School after police scoured the campus in search of a possible threat to students, district officials said.

El Cajon police combed the 66-acre campus and searched about 20 buildings Thursday morning but were unable to substantiate any threat to students, according to Catherine Martin, spokeswoman for La Mesa-based Grossmont Union High School District. Canine searches were also conducted with assistance from U.S. Customs and Border Protection agents during the three-hour lockdown.

The El Cajon school was placed on lockdown sometime before 9 a.m.

"Students are safe in classrooms," Martin tweeted at 8:57 a.m.

In subsequent tweets over the next three hours, Martin reported that police were investigating a "possible threat" to students but clarified "no students at Grossmont High School were directly threatened."

While the campus was secured, classroom doors were locked, but instruction continued, Martin said. Classrooms were equipped with crisis buckets that included supplies such as snacks and water.

The origin of the possible threat was not immediately disclosed.

City News Service contributed to this report.