December 7 is known as "national students' day" in Iran, and it marks the anniversary of the 1953 slaying of three students by Shah Mohammed Reza Pahlevi's security forces, following a coup against populist Prime Minister Mohammed Mosadegh, earlier that year Eyewitnesses say hundreds of students have received threatening emails,this week, warning them not to participate in Monday's demonstrations.

VOA: standard.2009.12.07