A University of Hong Kong document detailing the planning of security arrangements for Vice-Premier Li Keqiang's campus visit last month shows that the police asked for the protest zone to be set well away from the ceremony venue. The university asked that Li should be able to see the protesters on the campus, according to the document. But that demand was turned down by the police, who cited concerns about maintaining security for the high-ranking official. The document will be submitted at tomorrow's second meeting of a Legislative Council panel convened to discuss the security measures taken during Li's three-day visit to the city last month. The hearing is expected to cover the detention of three students during protests on the HKU campus on August 18. The trio was locked in a stairwell for an hour as Li attended the university's centenary celebration ceremony in Loke Yew Hall. The high-profile visit - Li is expected to succeed Wen Jiabao as premier in 2013 - has emerged as an emotional flashpoint between the government and civil rights advocates, who argue security tactics were heavy handed and compromised freedom of expression. HKU and the police have provided contradictory versions of their discussions on security arrangements and whether the three students were detained by the police or by campus security guards. During the panel's meeting on August 29, Police Commissioner Andy Tsang Wai-hung said it was the university's decision to enlarge the restricted zone around the event. Tsang said police provided assistance to university security only to stop the three students from entering the zone through the stairwell. Tsang has also said the arrangements were discussed with HKU in three meetings before Li's visit, but did not provided details of these meetings at the Legco panel's previous hearing. According to the HKU document released yesterday, university and police representatives first met to discuss security arrangements on August 4. It was agreed then that a protest zone would be set up in an open area about 50 metres away from Loke Yew Hall and that Li's motorcade would pass through. However, during the third meeting, on August 17, the police asked that the protest zone be moved to an open space about 200 metres away from Loke Yew Hall. By then, the police knew students and alumni were planning demonstrations. HKU expressed reservations about the move and pressed to keep the protest zone closer to the event. Police turned down the demand because they feared the protesters would block Li's motorcade or throw objects at it. The document also states that the university had repeatedly demanded that the police avoid confrontations with protesters. 'The university does not want any collision on the campus,' the document states. 'Students and alumni have the right to hold activities on the campus. So the university does not want to see anyone to be taken away or even detained.' Tsang and Secretary for Security Ambrose Lee Siu-kwong will attend tomorrow's panel meeting and are expected to speak again about the visit. The three students detained - Samuel Li Shing-hong, Sam Wong Kai-hing and Leo Tang Kin-wa - have also confirmed they will attend. HKU dean of student affairs Dr Albert Chau Wai-lap and registrar Henry Wai Wing-kun are expected to provide details on the university's security planning for the ceremony. Earlier, HKU announced the membership of its own panel - led by former Law Society chairman Lester Huang - which will review policing during the vice-premier's visit. The group will also include a representative from the Postgraduate Students Association, dean of law faculty Johannes Chan, Professor Cecilia Chan from the faculty of social science, alumni and retired executive chief editor of Ming Pao, Simon Fung Shing-cheung, former students' union president Patrick Wong and two university council members. The university's students' union refused to nominate someone to represent undergraduate students. It has instead called for an independent investigation into the event headed by a retired judge.