Authorities at Virginia Tech have sent out a questionnaire asking students for any information they may have about gunman Seung-Hui Cho and his first victim.

A timeline of the Virginia Tech shootings in America has emerged as police provided new details about what happened on that fateful morning 10 days ago.

Virginia Tech students made a sombre return to their US campus today, pausing for a moment of silence to remember the 32 classmates murdered a week ago.

Virginia Tech killer Cho Seung-Hui went on eBay less than a month before the massacre to buy ammunition clips for one of the two handguns he used in the rampage.

PHOTOS, videos, prayers and rumours spread across the internet within minutes of the Virginia Tech massacre as people from around the world used websites to mourn the victims and get the latest information about the shootings.