The shooter was identified as Cho Seung-Hui, a senior in the university's English department, who the South Korean Foreign Ministry said had been living in the United States since 1992. Cho was the only suspect named in the deadliest shooting rampage in U.S. history, which left 33 dead including himself.
South Korea's largest newspaper Chosun Ilbo reported that Cho's family was poor when they lived in a Seoul suburb and decided to emigrate to seek a better life.
The family lived in a rented, basement apartment - usually the cheapest unit in a multi-apartment building, the newspaper reported quoting building owner Lim Bong-ae, 67. Police identified the shooter's father as Cho Seong-tae, 61.
"I didn't know what (Cho's father) did for a living. But they lived a poor life," Lim told the newspaper. "While emigrating, (Cho's father) said they were going to America because it is difficult to live here and that it's better to live in a place where he is unknown."
The small apartment where the family lived is now vacant and its front door was left unlocked Wednesday. Mildew stains mark the pale blue walls of the three-room residence, which is no larger than 40 square meters.
At the Shinchang Elemetary School that Cho attended for first grade and half of second grade, there were no records of the former student besides that he left school Aug. 19, 1992, officials said. Cho's former homeroom teacher was no longer working at the school and other teachers did not remember Cho.
Meanwhile, South Korean President Roh Moo-hyun held a special meeting with aides Wednesday to discuss the shooting, as the public expressed shame over a South Korean countryman being identified as the gunman.
"I and our people cannot contain our feelings of huge shock and grief," said Roh during a joint news conference with Italian Prime Minister Romano Prodi. "I pray for the souls of those killed and offer words of comfort from my heart for those injured, the bereaved families and the U.S. people."
It was the third time that Roh has offered condolences since Tuesday. Roh also sent a similar message Wednesday to U.S. President Bush.
The case topped the front pages of nearly all South Korean newspapers Wednesday, which also voiced worries that the incident may trigger racial hatred in the U.S. and worsen relations between the strong allies.
"We hope that this incident won't create discrimination and prejudice against people of South Korean or Asian origin," said the Hankyoreh newspaper in an editorial.
A sense of despair prevailed among South Korean public.
"I'm too shameful that I'm a South Korean," wrote an Internet user identified only by the ID iknijmik on the country's top Web portal site, Naver - among hundreds of messages on the issue. "As a South Korean, I feel apologetic to the Virginia Tech victims."
Kim Min-kyung, a South Korean student at Virginia Tech reached by telephone from Seoul, said there were about 500 Koreans at the school, including Korean-Americans. She said she had never met Cho. She said South Korean students feared retaliation and were gathering in groups.
South Korean Foreign Minister Song Min-soon sent a letter to U.S. Secretary of State Condoleezza Rice Tuesday night, expressing condolences and sympathy for the victims, the ministry said.
South Korean diplomats were traveling to the shooting site, said Foreign Ministry spokesman Cho Hee-yong.
Cho Seung-Hui was in the U.S. as a resident alien with a home in Centreville, Virginia, and lived on campus, the university said. School spokesman Larry Hincker said Cho was a "loner."
South Korea has more students studying in the United States than any other country, according to U.S. Immigration and Customs Enforcement.
The number of South Korean students reached 93,728 as of the end of last year, 14.9 percent of the total, ahead of India at 76,708 and China at 60,850, according to a February report from the agency.
Despite being technically a state of war for decades against North Korea, South Korea is a country where citizens are banned from privately owning guns, and where no school shootings are known to have occurred.
However, it has not been immune from shooting rampages.
In 2005, a military conscript believed to be angered by taunts from senior officers killed eight fellow soldiers, throwing a grenade into a barracks where his comrades were sleeping and firing a hail of bullets.
South Korea was also the scene of one of the world's deadliest shooting sprees, when police officer Woo Beom-gon went on a rampage in 1982 in the southeastern village of Euiryeong, killing 55 people and wounding 35 others.
After a quarrel with his live-in girlfriend and drinking, Woo stole two rifles, 180 rounds of ammunition and six hand grenades from a police station and a weapons storehouse for army reservists. The overnight spree where he fired indiscriminately went on for eight hours in four villages.
Woo died the following morning when a hand grenade exploded in a room where he was with three other villagers.