A school in California was put on lockdown Wednesday after a shooting threat.

San Leandro High School was on lockdown after a threat was found in a bathroom stall that said: "I'm shooting the school tomorrow at 1. I'm sick of this shit. Better not come. F--- this place," according to multiple reports.

@KTVU someone wrote this at San Leandro high school bath room in CA San Leandro now the school is in lock down please talk about this is not funny and this needs to be stopped pic.twitter.com/ranVwyk5v9 — Roger (@_StarFox) March 14, 2018

#BREAKING: San Leandro High School on lockdown, according to school district. https://t.co/m1l2PTt7Nh pic.twitter.com/XKHNJjzz3m — NBC Bay Area (@nbcbayarea) March 14, 2018

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The San Leandro school district said the move is a "strictly a precautionary move in order to systematically inspect the school grounds," KTVU reported.

The threat comes as students across the country hold walkouts to protest gun violence and call for gun control following a mass shooting at Marjory Stoneman Douglas High School in Parkland, Fla.

Since the Florida shooting, students have been leading the charge to demand lawmakers pass new laws to prevent future school shootings.

A Twitter user posted a picture that showed students holding up a sign that said "It could be us next," which the user said was taken at San Leandro High School just minutes before the lockdown.

This was us only 5 minuets before the lockdown happened at San Leandro high school, we wanted our voices to be heard for the nation wide walk our walk at 10, such irony is sad pic.twitter.com/EQ6orDI5f3 — Julian (@Julian25L) March 14, 2018

That same user had earlier tweeted: "I am a student at San Leandro high school and I’m tweeting for the students and I can confirm we are all currently safe and locked inside of our classrooms. No new information has surfaced about the picture or who the suspect could of been, updating soon."

A march is also being held later this month in Washington, D.C., to protest gun violence and continue the movement.