JERUSALEM -- The e-mails from grateful students arrived soon after Liviu Librescu was shot to death, telling how the Holocaust survivor barricaded the doorway of his Virginia Tech classroom and saved their lives at the cost of his own.

Librescu, an Israeli engineering and math lecturer who survived the Nazi killings and later escaped from Communist Romania, was one of several foreign victims of Monday's shootings, which coincided with Israel's Holocaust remembrance day.