A university spokeswoman said it was not known how long the process would last, nor how many students would be involved.
A series of anti-Israel policies are in place at the students' union, and it had actively joined a campaign against the invitation to Mr Roth-Snir to speak to the government department.
Union president Nathan Bolton said the invitation had “beggared belief” because of what he said were Israel’s apartheid policies against Palestinians. He said forcing Mr Roth-Snir from the campus had been a "great day".
Following the incident a university spokeswoman said that while it was not believed that there had been a direct threat of violence to Mr Roth-Snir, a decision had been taken “quickly” to move him from the campus when the protests escalated.
The Israeli Embassy strongly condemned the incident.