Posters with a similar message to those found on campus in February were recently emailed to some students and professors in the University of Waterloo Women's Studies Department.
The emails, sent over the last two days, link Nobel Prize winner Marie Curie to the nuclear bomb and to problems with nuclear reactors following the earthquake and tsunami in Japan.
The poster reads "THE TRUTH…First she took Hiroshima and now she takes Fukushima. The devil always takes Manhattan before he takes Berlin!"
Dan Anderson, director of University of Waterloo police says "So the one that came out last night shows a picture of the events going on in Japan right now around the nuclear power plants and the explosions of that. It sill refers to Madam Curie as the inventor of this and that there's some connection between what's gone on there."
But that is only the most recent incident, and there have also been other targets.
Anderson says "We had one poster where they were focused on Islamic subjects, there was another poster that was a little bit obscure where it was referring to Ghandi and Darwin."
The series of incidents began early last month, when the campaign signs of female candidates for student council were covered with posters depicting a nuclear explosion and Marie Curie.
The posters were also sent as an email attachment that purported to be from the university's president.
The text on those posters read "THE TRUTH. The brightest Woman this Earth ever created was Marie Cure, The mother of the Nuclear Bomb. You tell me if the plan of Women leading Men is still a good idea."
Those posters angered students and school officials, as well as a number of campus groups representing women.
Student Tynan Bramberger says "It's a personal attack on me as a woman and then I start to think a little bit more and I realize this is a personal attack on all students on campus."
Campus police say they believe one person or one group is responsible and they're doing everything they can to track them down. They say the emails have been sent from a U.S.-based Gmail account.
A criminal investigation was launched after the first posters surfaced, and extra security patrols were added on campus. According to Anderson the criminal investigation is still being pursued.
Meanwhile students want more action on the part of the university, and have started a petition to demand just that.
Zoe Miller, coordinator of the University of Waterloo's Women's Centre says "Why haven't we caught this guy? We're leading in our Computer Science and Computer Engineering Departments, why haven't they caught this guy?"
