Story highlights Jabari Dean, 21, is accused of threatening to kill students and staff at the University of Chicago

He purportedly posted online that he planned to kill 16 white male students or staff

Students, staff told to stay away; dorm residents asked to stay inside

(CNN) A 21-year-old man was arrested Monday, accused of threatening to kill students and staff at the University of Chicago in an apparent attempt to avenge the death of Laquan McDonald, authorities said.

Jabari Dean, 21 was arrested without incident. He is expected to appear in court later in the day.

According to a criminal complaint, Dean posted a threat on social media over the Thanksgiving weekend.

"This is my only warning. At 10 a.m. on Monday mourning (sic) I am going to the campus quad of the University of Chicago. I will be armed with a M-4 Carbine and 2 Desert Eagles all fully loaded. I will execute aproximately (sic) 16 white male students and or staff, which is the same number of time (sic) Mcdonald (sic) was killed.

"I then will die killing any number of white policemen that I can in the process. This is not a joke. I am to do my part to rid the world of the white devils. I expect you to do the same," the post read.

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