Nassau County police have given the "all clear" at Long Beach High School, lifting a lockdown Wednesday morning after someone called in a threat to the school, school officials said.

The school, in Lido Beach, was placed under lockdown following the threat just before 8 a.m., while Nassau County police searched the building to make sure there was no danger inside, Long Beach Superintendent Jennifer Gallagher said in a letter to parents.

After the lockdown was lifted, students were allowed to access their cellphones to text or call parents.

School officials said they would "lead students in "a few calming activities to settle everyone down," Gallagher said in an update to parents. The school planned to resume regular class periods.

"The police now feel that it is safe to resume normal a

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