An official at a leading university said Friday two microscopic tissue samples used for medical education may have come from the corpses of Nazi victims, but he denied the practice was widespread.

A report by the television network ARD that West German universities still use body parts from Nazi victims for medical instruction has touched off angry reaction from Israeli officials, who called for an investigation.But administrators at three West German universities said they knew of no tissue samples from Nazi victims at their institutions, and a fourth school - Tuebingen - said it has withdrawn from its anatomy collection the two microscopic examples it had had in store.