An undergraduate may face indecent assault charges after a woman was attacked in a dormitory block at the University of Hong Kong. A medical faculty student, aged 23, was arrested on Monday on suspicion of molesting the 21-year-old female student, who had left her door unlocked. The man was released on $2,000 bail and ordered to report to police in four weeks. The university will decide whether to suspend him after it receives a full report from police, and its disciplinary committee hears the case. The victim was woken up at about 6am on Monday as she slept alone in her room at the university. She tried to scream, but her attacker gagged her with his underwear, according to police. Both of them fell from the bed on to the floor during the struggle and the culprit fled. Detectives searched the dormitory with the hall supervisor and found the suspect in one of the rooms on the 13th floor. Bottles of beer were found in the suspect's room. Police said they were seeking legal advice on whether to charge the student with indecent assault. They may also meet the university to discuss security issues on campus. A university spokesman said yesterday that security guards were on round-the-clock duty at the entrance to the residence hall. 'We believe this incident has nothing to do with a security problem. This is an isolated incident. 'The female student hadn't locked her door before she went to sleep. 'We are planning to do more to educate students to be more alert to crime and in protecting themselves.' The spokesman said there was no need to review the policy of men and women living in the same halls.