Eleven Hanover High School seniors won’t be allowed to participate in this Saturday’s graduation ceremonies because they were caught drinking on school grounds, according to media reports.

According to The Enterprise, Hanover police were called to the high school just before 11 a.m. on Wednesday, May 21, after the 11 students entered the school under the influence of alcohol.

The students will be allowed to graduate, the newspaper reported, but will not be permitted to participate in the June 7 graduation ceremonies.

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Principal Thomas Raab told WCVB that the students were reprimanded according to the school’s discipline policy.

"Every year, I think around graduation time, we often have maybe one student [involved in an] incident, but we have never had something of this scope," WCVB quoted Raab saying.

According to Hanover High School’s handbook “violation of the drug and alcohol policy at any time during the two weeks prior to graduation” gives the principal the right to deny a student’s participation in commencement activities.

The incident happened 17 days before graduation.