Update: there is an Alumni petition here
Update 2: Student Union statement and Amnesty International press release
Update 3: Warwick for Free Education site
Original links:
Statement by Vice-Chancellor, Nigel Thrift
Letter to Registrar from Warwick staff (Update: another version appears here, with more signatories)
Statement by Warwick UCU (below):
Warwick WUCU branch committee are concerned at the incidents which occurred on Wednesday 3rd December in Senate House when a group of Warwick University students, staging a sit-in to protest against university tuition fees, were subject to what appears to be excessive police action.
A video, which was subsequently posted on YouTube, showed students being grabbed and pushed and having their hair pulled, followed by CS spray being used at very close range. Also in the footage, a taser gun can be seen and heard, and there have been subsequent reports that it may have been discharged against one student. At the time of writing, three students are being held at Coventry police station.
According to reporting in the Coventry Telegraph, the police were called by university officials to attend the protest after a claim that a protester had attacked a member of staff. There is nothing in the video or other reporting to suggest that there was an imminent threat at the time of the police action, and their behaviour appears disproportionate and unacceptable. ACPO guidelines, for example, state that CS spray ‘should not be used at a distance of less than one metre unless the nature of the risk to the officer is such that this cannot be avoided’ – it is not at all clear from the video footage and reporting that there was such a risk. The students state that they had been sitting in a circle discussing free education and the university community and that they had not been informed that the police had been called and nor did the police, on arrival, tell them why they were there.
We call on the university to publicly affirm its commitment to democratic values and the rights of students and staff to protest peacefully against policies and practices with which there is disagreement. The university is our common space and we protest in the strongest terms against the violations that were allowed to take place here today.
Warwick UCU
I wouldn’t usually link to Wikipedia, but this is 
