Seaford High School.

Seaford High School. Credit: Newsday / Audrey C. Tiernan

A Thursday morning precautionary lockout at Seaford High School, instituted after district officials notified Nassau County police of a threat, has been lifted after police investigators determined the threat was "non-credible," officials said.

In a message to the school community, Seaford Superintendent of Schools Adele Pecora characterized the threat as a "concerning phone call."

A district spokesperson said police were notified at 6:50 a.m. Officers were sent to the scene and, as per protocol, a lockout was instituted.

"The schools are safe and the lockouts have been lifted in all buildings," Pecora wrote in a subsequent message. "All after school activities will occur. We thank the NCPD for their quick response and thorough investigation."

Suffolk Police Officer David Mascarella is back on the job after causing a 2020 crash that severely injured Riordan Cavooris, then 2. NewsdayTV's Andrew Ehinger and Newsday investigative reporter Paul LaRocco have the story. Credit: Newsday/Kendall Rodriguez; Jeffrey Basinger, Ed Quinn, Barry Sloan; File Footage; Photo Credit: Joseph C. Sperber; Patrick McMullan via Getty Image; SCPD; Stony Brook University Hospital

'It's disappointing and it's unfortunate' Suffolk Police Officer David Mascarella is back on the job after causing a 2020 crash that severely injured Riordan Cavooris, then 2. NewsdayTV's Andrew Ehinger and Newsday investigative reporter Paul LaRocco have the story.

Suffolk Police Officer David Mascarella is back on the job after causing a 2020 crash that severely injured Riordan Cavooris, then 2. NewsdayTV's Andrew Ehinger and Newsday investigative reporter Paul LaRocco have the story. Credit: Newsday/Kendall Rodriguez; Jeffrey Basinger, Ed Quinn, Barry Sloan; File Footage; Photo Credit: Joseph C. Sperber; Patrick McMullan via Getty Image; SCPD; Stony Brook University Hospital

'It's disappointing and it's unfortunate' Suffolk Police Officer David Mascarella is back on the job after causing a 2020 crash that severely injured Riordan Cavooris, then 2. NewsdayTV's Andrew Ehinger and Newsday investigative reporter Paul LaRocco have the story.

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