Township police are investigating an anonymous Facebook threat made Feb. 5 against an FHS administrator.

An anonymous Facebook threat seen Feb. 5 against a Franklin High School administrator was deemed by investigators to not be credible, police and school district officials said.

A school district official said the threat against the unidentified administrator was seen the evening of Feb. 5. Although police determined that the threat was not credible, there was an increased police presence when the school opened at its regular time on Feb. 6.

The extra police were there to “reassure our staff and students,” said district spokeswoman Mary Clark.

Orvyl Wilson, director of school management, later sent a letter to parents describing what happened.

“Please know that both the district and local law enforcement officials take any threat to the safety and security of our schools very serious,” Wilson wrote. “Every effort will be made to identify any and all individuals associated with making these threats, whether they are credible or not, and they will be prosecuted to the full extent of the law and (Board of Education) policy.”

Wilson’s letter was also posted on the district’s web site.

Police spokesman Lt. Phil Rizzo said the incident is under investigation by township police detectives.