Nansemond River High School students encountered metal detectors and an increased law enforcement presence at school on Wednesday after administrators received “general information” through a social media site, according to a letter sent to parents.

Late Tuesday, the school received “general information” from a social media site, according to the letter from Principal Daniel O’Leary Jr.

“A decision was made to implement metal detector checkpoints this morning as a proactive safety measure to help ensure a smooth running school day,” O’Leary wrote. “As routinely done, local law enforcement and school system officials were immediately notified of the information received and have been an integral part of the ongoing process. Extra law enforcement presence was on hand today and the metal detector check points ran efficiently as expected.”

The situation and social media information is still under investigation with the school administration and local law enforcement, according to the letter.

“The Suffolk Police were made aware of a potential threat from the school personnel who received it and responded appropriately,” city spokesman Tim Kelley stated in an email.

The school letter urged the student body, as well as faculty, staff and the community, to report anything that could possibly help the investigation.

“At this point, Suffolk Public Schools will not be releasing any details,” Bethanne Bradshaw, school division spokeswoman, said in an email.

It was the latest safety concern for Suffolk Public Schools after a 15-year-old student was found to have a gun in his possession at King’s Fork High School last Tuesday. On Thursday at King’s Fork High, several fights broke out.