The city initially shared an update at about 5 p.m. and said that at 3:32 p.m., San Marcos Police responded to a call for an active shooter at San Marcos High School.

SAN MARCOS, Texas — A lockdown has been lifted at San Marcos High School following an anonymous threat on Tuesday afternoon. According to San Marcos CISD, around 3:58 p.m., the campus was in a ...

San Marcos High School is currently on a “secure” lockdown, and no one is allowed to leave or enter the campus, San Marcos Consolidated Independent School District said on its website.