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ROMEOVILLE, Ill. — Students across the country staged a walkout protest against gun violence today, but Romeoville High School students stayed inside after a threat on social media.

The suburban high school changed its walkout plans after reports of a threat on Instagram.

Parents and students alerted Romeoville police Tuesday of a post with a male student holding a firearm, which several students commented on and shared.

Police investigated and determined it was an air-soft gun, and that the post was not a legitimate threat.

But, as a precaution and due to the timing of the post, RHS principal Derek Kinder told families that all students will remain indoors today with a normal class schedule.

But the school held a special assembly in memory of the victims of the shooting.

“It really was 17 minutes of silence, reflection, interpretation of lives lost and how the movement is making an impact,” Kinder said.

Meantime, a pro-gun group called Overpasses For America, organized a morning march to Romeoville High School in a show of support for the second amendment and the right to bear arms.

Police were at the school to ensure safety.