Virginia Tech University says a senior from South Korea was behind the deadliest shooting rampage in modern U-S history.
The Virginia Tech Police Department has identified him as Cho Seung-Hui.
The Virginia State Police say ballistics tests show one of the guns that was found after the shooting rampage was used in both shootings, at the dorm and at the classroom building.
The incident ended with the gunman's suicide, bringing the death toll from the two separate shootings to 33.
A police official says it's "reasonable'' to assume that Cho was the shooter in both cases, but authorities haven't made the link for sure.