Bayonne has closed all of its public schools today "out of an abundance of caution" after a threat that "all Bayonne schools would be shot up Monday morning" was made on Twitter, Mayor Jimmy Davis said this morning in a Facebook post.

Davis said in the post that police have not identified the author of the tweet and that it is still under investigation, and that it is not deemed credible.

He added, however, that he "consulted with (Bayonne Police Department) and (the Bayonne Board of Education), and since we cannot rule anything out, I have ordered that the BBOED close all schools in the district today."

Last night Bayonne schools Superintendent Michael Wanko sent a note to parents advising them that because of the threat, more police would be stationed outside all city schools. He said in his note that the threat was made Friday and he was made aware of it last night.

North Bergen school officials said schools there would be under even tighter security today after a threat that was discovered written within the school.

"At this time we do not believe that there is any risk to student safety or any credibility to the threat, however, we are taking these proactive steps out of an abundance of caution to ensure that students are safe and to give parents and the community peace of mind," Superintendent George Solter said in a note to students and parents.

High Tech High School officials said the school would follow lockdown procedures today because of the threat reported by North Bergen school officials. Students will not be allowed to leave the school the entire school day, said Phil Swibinski, a spokesman for the county school district.