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MIAMI (CBSMiami) – A precautionary lock-down of a Monroe County school, which was implemented after a report of what may have been a gun on campus, has been lifted.

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The lock-down was ordered just before 8 a.m. after the county’s sheriff’s office said they received a report about a male “possibly carrying something resembling a gun entering Coral Shores High School” in Tavernier.

Deputies began clearing the school and looking for anything unusual.

Parents were urged not to go to the school to pick up their children because they would not be allowed on the school grounds, according to sheriff’s spokeswoman Becky Herrin.

At 9 a.m., Herrin issued an update:

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“No sign of any suspicious person or activity so far at Coral Shores High School as deputies continue to clear the building. All students and teachers are on lock-down status for security reasons. If you are a parent, or other concerned individual, please be patient as we make sure everyone at the school is safe.”

At 10 a.m. the search was concluded, no armed person was found and the lock-down was lifted.

“We are, of course, relieved that this turned out to be a false alarm but it is important we all treat any report seriously,” said Sheriff Rick Ramsay in a statement. “The safety of children in our schools and our community remains the highest priority to all of us here at the Sheriff’s Office.”

“The Sheriff’s Office trains at area schools for just such a situation and this response was accomplished quickly, safely and completely due in large part to that training,” according to a release from the sheriff’s office.

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School administrators said the school will remain open, but parents could pick up their kids if they wish to.