Police in the eastern U.S. state of Virginia say the gunman in Monday's shooting rampage at Virginia Tech University legally purchased the weapons he used in the attacks.

State Police Superintendent Colonel Steve Flaherty told reporters Tuesday that police recovered two weapons used by gunman Cho Seung-hui, who was a student at the school.

Flaherty said police have issued a warrant to search Cho's campus dorm room as part of their investigation into the killings by Cho of more than 30 people. Police say Cho killed himself but Flaherty said there is no evidence yet to suggest Cho left behind a suicide note.

Officials at Virginia Tech describe the South Korean native as a "loner."

Cho's classmate, Paul Kim, told VOA's Korean service that Cho was "really quiet." Kim said Cho constantly looked at the ground, avoided eye contact, and refused to respond when the professor spoke to him.

Kim said the two had class together three times each week.

The 23-year-old Cho was in his final year at the school, studying English literature. He was a resident alien who had lived in the U.S. since 1992.

When not living in a Virginia Tech dormitory, Cho resided in a suburb of Washington.

Some information for this report provided by AP and Reuters.