A student was arrested after allegedly threatening to commit a "mass murder" at a Miami-Dade high school, police said.
The student was involved in a group chat with friends Saturday when the discussion became heated, Miami-Dade police officers said in an arrest report.
He became angry and wrote, "I am going to attempt to mass murder on Monday October 7 at G. Holmes (Braddock) Senior High. You have the warning don't be surprised when I walk into your class and start shooting everyone."
"I hope many of you will show up," the message said in part. "I am looking forward to it."
Police said a friend became scared and reported the incident to the FBI.
Miami-Dade County Public Schools officials confirmed the arrest.
It's unknown if the student arrested attended Braddock Senior High School. NBC 6 is not naming the student because he is a minor.
