Sheriff's deputies respond to reports of a gunman on the San Marcos High School campus
Paul Wellman

[Update, 11:30 a.m.]: The incident was a false alarm, reports Sheriff’s officials, who just issued this tweet: “Safe Resolution to SMHS incident. The individual was contacted. His car had broken down & he was holding a radiator hose not a gun. It was a big misunderstanding. Thanks to the student for doing the right thing and reporting incident right away. We are glad everyone is safe.”

[Update, 11:20 a.m.]: Police radio communications suggest the gunman scare has fully subsidised. Authorities have not yet responded to requests for comment. This story will be updated with more definitive information as soon as it’s available.

[Update, 10:55 a.m.]: The Sheriff’s Office is reiterating that there have been no reports of shots fired or injuries. “A student reported a subject w/ a gun in parking lot,” a tweet from the department reads. “Parents are asked to avoid the area since campus is on lockdown while deputies investigate.”