Updated at 12:28 p.m.

SCOTCH PLAINS, NJ — A suspect was held then released Tuesday morning after a threat on social media prompted a lockdown at Union County Vocational Technical Schools, a spokesman for Union County Police said.

Information about the suspect was not immediately available, the spokesman, Sebastian D’Elia, said. Police searched the buildings and found no threats, he said.

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“Everything is clear now,” D’Elia said. “The lockdown is over. The suspect [was] being held for questioning.”

The lockdown was lifted at about 11:20 a.m., an automated message sent to parents and guardians said.

The West Hall building of the Union County Vocational Technical Schools had gone into lockdown around 8:40 a.m., with the remaining buildings sheltering in place until they, too, were locked down until about 11:20 a.m. while police conducted a sweep.

Union County police, along with the sheriff's office and prosecutor's office are continuing their investigation, D’Elia said.

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