Boston University acted fast on this one:

A part-time Boston University student was banned from campus yesterday after pleading not guilty to charges of threatening to commit a crime when he allegedly said he would recreate the Virginia Tech shootings to a woman he had dated at a nearby college.

Andrew Rosenblum, 20, was held on a $50,000 cash bail and ordered to remain under house arrest and wear a 24-hour GPS monitoring device if he posts bail. He would only be allowed to leave his home with an escort when visiting his doctor or attorney.

Rosenblum had sent online messages hours after Monday's deadly shootings to a woman at Wheelock College, threatening to kill her friends and himself, according to police.

Rosenblum pleaded not guilty to three counts of threatening to commit a crime at the Roxbury Division of the Boston Municipal Court Department yesterday. He will return to court for a pre-trial conference June 13, according to a press release from the Suffolk County District Attorney's Office.