Northern Illinois University in DeKalb has been closed on Monday, following a threat written on a bathroom wall, which includes a racial slur and reference to the Virginia Tech shooting.

"Tell those n---ers to go home," and "ME/OUT…Die Sem Burr 10th … Hmz Sdn Cr," read the black ink on the wall, which officials believe refers to “December 10” and “Holmes Student Center” the alert said. The whole note had as headline the word “WATCH.”

"What time? The VA tech shooters messed up w/ having only one shooter…" was written beneath the first entry, making reference to the April 16 Virginia Tech massacres, where a gunman killed 32 students before killing himself.

All the students, facility and staff were announced about the threat via email, through the university’s website, university officials said. They already are working on distributing fliers throughout the campus.

"Only essential service personnel should report to work on Monday," the statement of the university said. Exams scheduled for Monday will be held on Friday.

The authorities increased the number of police officers assuring the security of the university to make sure that the campus stays safe. Moreover, police from other communities surrounding the university will be present as well.

"My primary concern is for the safety of all members of our campus community and to that end, we err on the side of caution in all our actions. We will not tolerate threats against individuals or groups nor will we tolerate ‘hate speech’ of any type on this campus," NIU President John Peters said in a statement.

The alert also said that members of the community should remain “calm and vigilant” and asked anyone who could provide information about the threats to call the NIU Tipline at (815) 753-TIPS or local police.