CHICAGO (WBBM) - Chicago Sun-Times columnist Michael Sneed reports the gunman was a 25-year-old Chinese national who came to the United States last year on a student visa.
Citing an unidentified source, investigators have not linked the man to any terror groups.
Sneed reports the man arrived in the U.S. in San Francisco on a visa issued in Shanghai.
Three bomb threats on the Virginia Tech campus last week may have been attempts by the gunman to test the campus security response, according to the Sneed report.
On Monday, an Asian student at Virginia Tech in Blacksburg, Va. massacred at least 30 people in the deadliest shooting rampage in modern U.S. history, cutting down his victims before the university could grasp what was happening, the university president said Tuesday.
The bloodbath ended with the gunman's suicide, bringing the death toll from two separate shootings - first at a dorm, then an engineering building - to 33 and stamping the campus in the picturesque Blue Ridge Mountains with unspeakable tragedy.