His wife, Marlena Librescu, was informed by phone that her husband was injured. She searched for him in several local hospitals but was unable to find him. Later she learned that he had been killed.
Students have been sending e-mails to his wife detailing his heroic act. Librescu was born in Romania. He survived the Holocaust and immigrated to Israel in 1978.
He moved to Virginia in 1986. His sons are now trying to bring his body back to Israel to be buried.
Iran publicly condemned the killings.
In a statement issued today, Foreign Ministry spokesman Mohammad-Ali Hosseini condemned the killings and expressed his condolences to the United States and the families of the victims.
"Killing innocent people, irrespective of their race and nationality, is contrary to divine and human values no matter which group or person carries out such an act under any name," the statement said.
In India, the Minister of External Affairs, Anand Sharma described the shooting incident at Virginia Tech as "shocking" and "a terrible tragedy."
The two leading news networks, NDTV and CNN-IBN led with the story of the Virginia Tech massacre.
With 700 Indian students at Virginia Tech, interest in the event continues to be high, following the news that Indian professor, G. V. Loganathan, 51, was among the victims.
His brother, Palanivel Loganathan, was interviewed by reporters with the Press Trust of India in Tamil Nadu, and said: "For us it was like an electric shock. We've totally collapsed today. Our parents are elderly and have broken down completely".
Since Loganathan's parents have no passports, the Indian authorities have been approached to help them make the journey to Virginia, where the professor wished to be laid to rest.
Concern continues to be high in the country as new reports say 21-year-old Indian student, Minal Panchal is among the missing.
Bloggers at NDTV.com and the Indian Web portal, Rediff.com commented on the gun culture in the United States:
S.A. Srinivasa Sarma wrote: "The shooting incident clearly indicates that democracy cannot be a freedom and licence for carrying guns and killing people."
Jignesh Vashi wrote: "As long as there are no tough gun control laws there and the gun lobby headed by Bush is allowed to have its way such incidents cannot be avoided."
Australia: Gun Culture Is 'Such a Negative' in the United States
In Australia, Prime Minister John Howard expressed his sympathy with the families of the victims at Virginia Tech. But he also expressed a rare difference of opinion with President Bush, a staunch political ally, when he noted that tougher gun laws could have prevented such a tragedy from taking place.
"We took action to limit the availability of guns and we showed a national resolve that the gun culture that is such a negative in the United States would never become a negative in our country," he said.
Howard was responsible for the tough gun laws in Australia, established 11 years ago after a gunman went on one of the world's deadliest killing sprees at a Tasmanian tourist resort, leaving 35 people dead.
News of the horror didn't reach Asian audiences until the evening news reports. Because of the time difference, the story was still developing and still incomplete in the morning papers.