JACKSONVILLE, Fla. – Students at Riverside High School were on lockdown Tuesday morning after a threat was reported, the Duval County school district said.
No one is allowed to leave or enter campus during a lockdown.
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A photo shared with News4JAX appeared to show officers on the campus with weapons, and a News4JAX crew spotted fire engines, fire ambulances and marked patrol cars around the campus.
The district said police investigated the situation and gave the all-clear for the school. All students and staff are safe.
The school remained on lockdown as a precaution, the district said.